Every May in Cheyenne, WY from 1871 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.
| Year | Mean, °F | Rank | High, °F | Rank | Low, °F | Rank | Precipitation, in | Rank | Days missing |
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| 2026 | 53.9 | 35 | 66.2 | 46 | 41.5 | 23 | 2.19 | 83 | 0 |
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| 2025 | 53.6 | 39 | 66.3 | 43 | 41 | 31 | 1.65 | 107 | 0 |
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| 2024 | 51.8 | 68 | 65.5 | 51 | 38.1 | 99 | 0.34 | 150 | 0 |
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| 2023 | 56.1 | 5 | 67.7 | 30 | 44.5 | 2 | 2.76 | 50 | 0 |
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| 2022 | 52.2 | 62 | 65.2 | 55 | 39.3 | 70 | 1.78 | 101 | 0 |
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| 2021 | 50.8 | 88 | 62.2 | 100 | 39.4 | 65 | 2.72 | 54 | 0 |
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| 2020 | 54.1 | 33 | 67.3 | 33 | 40.8 | 33 | 1.06 | 133 | 0 |
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| 2019 | 47.1 | 142 | 58 | 140 | 36.2 | 134 | 5.19 | 8 | 0 |
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| 2018 | 56 | 6 | 68.7 | 17 | 43.4 | 5 | 4.10 | 19 | 0 |
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| 2017 | 50.8 | 88 | 62.6 | 94 | 38.9 | 78 | 3.89 | 23 | 0 |
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| 2016 | 50 | 104 | 61.6 | 107 | 38.3 | 95 | 2.03 | 93 | 0 |
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| 2015 | 48.2 | 131 | 57.7 | 144 | 38.8 | 81 | 5.99 | 4 | 0 |
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| 2014 | 51.9 | 65 | 63.5 | 80 | 40.3 | 44 | 2.99 | 41 | 0 |
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| 2013 | 52.4 | 58 | 64.8 | 57 | 40.1 | 50 | 1.01 | 137 | 0 |
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| 2012 | 54.8 | 20 | 69.2 | 11 | 40.4 | 41 | 0.30 | 154 | 0 |
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| 2011 | 47.1 | 142 | 57.8 | 142 | 36.5 | 127 | 3.12 | 36 | 0 |
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| 2010 | 48.5 | 123 | 60 | 129 | 37 | 121 | 3.06 | 40 | 0 |
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| 2009 | 53.3 | 44 | 64.3 | 68 | 42.2 | 10 | 2.08 | 89 | 0 |
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| 2008 | 50.4 | 99 | 63.1 | 89 | 37.6 | 113 | 2.50 | 62 | 0 |
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| 2007 | 53.3 | 44 | 66.4 | 40 | 40.2 | 47 | 1.40 | 118 | 0 |
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| 2006 | 54.5 | 25 | 68.5 | 21 | 40.6 | 35 | 1.61 | 109 | 0 |
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| 2005 | 52.1 | 64 | 64.7 | 58 | 39.5 | 64 | 1.29 | 126 | 0 |
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| 2004 | 55.5 | 14 | 68.6 | 19 | 42.4 | 8 | 1.04 | 135 | 0 |
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| 2003 | 53.5 | 41 | 65.5 | 51 | 41.4 | 26 | 1.41 | 117 | 0 |
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| 2002 | 51.2 | 78 | 64.9 | 56 | 37.5 | 116 | 0.75 | 145 | 0 |
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| 2001 | 52.6 | 56 | 64.3 | 68 | 40.9 | 32 | 2.24 | 78 | 0 |
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| 2000 | 55.5 | 14 | 69.2 | 11 | 41.8 | 14 | 1.38 | 119 | 0 |
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| 1999 | 50.5 | 94 | 62.3 | 97 | 38.7 | 85 | 2.04 | 92 | 0 |
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| 1998 | 53.3 | 44 | 66.6 | 37 | 40 | 53 | 2.35 | 72 | 0 |
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| 1997 | 51.7 | 70 | 64.6 | 60 | 38.8 | 81 | 2.47 | 66 | 0 |
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| 1996 | 51.6 | 73 | 63.2 | 87 | 40.1 | 50 | 2.24 | 78 | 0 |
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| 1995 | 45.7 | 151 | 54.6 | 152 | 36.8 | 122 | 6.00 | 3 | 0 |
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| 1994 | 56.8 | 3 | 70.1 | 7 | 43.6 | 4 | 2.05 | 91 | 0 |
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| 1993 | 53.4 | 42 | 65.5 | 51 | 41.3 | 27 | 1.92 | 99 | 0 |
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| 1992 | 55 | 17 | 68.5 | 21 | 41.5 | 23 | 1.86 | 100 | 0 |
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| 1991 | 52.4 | 58 | 64.5 | 61 | 40.3 | 44 | 3.84 | 24 | 0 |
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| 1990 | 49.3 | 113 | 62.2 | 100 | 36.3 | 133 | 3.37 | 33 | 0 |
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| 1989 | 54.2 | 32 | 67.7 | 30 | 40.8 | 33 | 1.37 | 120 | 0 |
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| 1988 | 53.2 | 48 | 66.4 | 40 | 40.1 | 50 | 3.09 | 38 | 0 |
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| 1987 | 54.5 | 25 | 65.8 | 50 | 43.1 | 6 | 4.43 | 14 | 0 |
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| 1986 | 50.6 | 92 | 63.5 | 80 | 37.7 | 111 | 1.03 | 136 | 0 |
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| 1985 | 54.3 | 28 | 68.2 | 25 | 40.4 | 41 | 1.05 | 134 | 0 |
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| 1984 | 53.6 | 39 | 67.4 | 32 | 39.8 | 56 | 0.78 | 143 | 0 |
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| 1983 | 47.4 | 139 | 58.6 | 138 | 36.1 | 138 | 2.31 | 74 | 0 |
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| 1982 | 50.5 | 94 | 62.5 | 96 | 38.4 | 92 | 3.56 | 29 | 0 |
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| 1981 | 50.5 | 94 | 60.6 | 117 | 40.3 | 44 | 5.67 | 6 | 0 |
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| 1980 | 51.1 | 82 | 62.1 | 102 | 40.2 | 47 | 2.39 | 70 | 0 |
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| 1979 | 49.9 | 105 | 60.7 | 116 | 39 | 77 | 2.90 | 44 | 0 |
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| 1978 | 49 | 119 | 60.4 | 122 | 37.5 | 116 | 3.98 | 22 | 0 |
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| 1977 | 53.4 | 42 | 66.3 | 43 | 40.5 | 37 | 2.50 | 62 | 0 |
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| 1976 | 51.1 | 82 | 63.5 | 80 | 38.7 | 85 | 2.07 | 90 | 0 |
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| 1975 | 48.4 | 125 | 60.2 | 126 | 36.6 | 125 | 2.27 | 76 | 0 |
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| 1974 | 55 | 17 | 68.7 | 17 | 41.3 | 27 | 0.11 | 156 | 0 |
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| 1973 | 51.4 | 76 | 64.4 | 66 | 38.4 | 92 | 0.31 | 153 | 0 |
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| 1972 | 51.2 | 78 | 63.8 | 76 | 38.6 | 88 | 2.76 | 50 | 0 |
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| 1971 | 49.2 | 115 | 60.5 | 118 | 37.9 | 107 | 2.38 | 71 | 0 |
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| 1970 | 54.3 | 28 | 68.1 | 26 | 40.4 | 41 | 3.13 | 35 | 0 |
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| 1969 | 55.6 | 12 | 68.9 | 14 | 42.4 | 8 | 1.77 | 102 | 0 |
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| 1968 | 49.2 | 115 | 60.9 | 112 | 37.4 | 119 | 3.54 | 30 | 0 |
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| 1967 | 49.1 | 117 | 60.1 | 128 | 38.1 | 99 | 4.04 | 20 | 0 |
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| 1966 | 55.6 | 12 | 71.4 | 3 | 39.8 | 56 | 0.21 | 155 | 0 |
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| 1965 | 50.7 | 90 | 63.3 | 85 | 38.2 | 98 | 3.11 | 37 | 0 |
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| 1964 | 54.6 | 24 | 67.3 | 33 | 41.9 | 12 | 0.84 | 141 | 0 |
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| 1963 | 55.8 | 7 | 71 | 5 | 40.6 | 35 | 1.14 | 131 | 0 |
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| 1962 | 55.1 | 16 | 68.6 | 19 | 41.6 | 20 | 2.72 | 54 | 0 |
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| 1961 | 52.8 | 52 | 64.2 | 71 | 41.3 | 27 | 2.92 | 43 | 0 |
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| 1960 | 55.7 | 10 | 69.7 | 9 | 41.7 | 15 | 0.96 | 138 | 0 |
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| 1959 | 50.5 | 94 | 61.7 | 106 | 39.4 | 65 | 4.16 | 17 | 0 |
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| 1958 | 56.9 | 2 | 69.9 | 8 | 43.8 | 3 | 2.98 | 42 | 0 |
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| 1957 | 48 | 133 | 57.8 | 142 | 38.3 | 95 | 5.35 | 7 | 0 |
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| 1956 | 54.7 | 22 | 67 | 35 | 42.5 | 7 | 2.56 | 60 | 0 |
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| 1955 | 53.1 | 49 | 66.5 | 39 | 39.8 | 56 | 2.27 | 76 | 0 |
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| 1954 | 50.6 | 92 | 62.9 | 91 | 38.4 | 92 | 1.45 | 116 | 0 |
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| 1953 | 47.7 | 137 | 59.3 | 134 | 36.1 | 138 | 1.47 | 113 | 0 |
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| 1952 | 51.6 | 73 | 64 | 74 | 39.3 | 70 | 2.67 | 56 | 0 |
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| 1951 | 51.2 | 78 | 62.9 | 91 | 39.4 | 65 | 2.77 | 49 | 0 |
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| 1950 | 46.2 | 147 | 58.3 | 139 | 34.1 | 152 | 2.48 | 65 | 0 |
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| 1949 | 51.9 | 65 | 63.2 | 87 | 40.5 | 37 | 4.27 | 15 | 0 |
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| 1948 | 52.7 | 54 | 66.1 | 48 | 39.4 | 65 | 0.92 | 140 | 0 |
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| 1947 | 49.9 | 105 | 62.6 | 94 | 37.3 | 120 | 2.19 | 83 | 1 |
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| 1946 | 45.9 | 149 | 56.9 | 149 | 35 | 149 | 4.15 | 18 | 0 |
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| 1945 | 50.4 | 99 | 64.1 | 72 | 36.8 | 122 | 1.31 | 124 | 0 |
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| 1944 | 52.3 | 60 | 66.2 | 46 | 38.5 | 89 | 2.00 | 95 | 0 |
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| 1943 | 47.2 | 140 | 58.7 | 137 | 35.7 | 144 | 4.21 | 16 | 0 |
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| 1942 | 48.7 | 120 | 61.9 | 104 | 35.5 | 148 | 3.27 | 34 | 0 |
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| 1941 | 54.3 | 28 | 66.7 | 36 | 41.9 | 12 | 0.66 | 147 | 0 |
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| 1940 | 53.9 | 35 | 68.4 | 23 | 39.4 | 65 | 1.29 | 126 | 0 |
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| 1939 | 54.5 | 25 | 69.1 | 13 | 39.8 | 56 | 1.69 | 105 | 0 |
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| 1938 | 49.9 | 105 | 61.8 | 105 | 38 | 104 | 2.31 | 74 | 0 |
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| 1937 | 52.9 | 51 | 66.6 | 37 | 39.1 | 76 | 1.19 | 130 | 0 |
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| 1936 | 55.8 | 7 | 69.6 | 10 | 42 | 11 | 2.90 | 44 | 0 |
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| 1935 | 44.7 | 153 | 53.5 | 153 | 35.8 | 143 | 5.89 | 5 | 0 |
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| 1934 | 59.9 | 1 | 73.7 | 1 | 45.5 | 1 | 1.66 | 106 | 1 |
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| 1933 | 48.3 | 127 | 59 | 136 | 37.6 | 113 | 3.44 | 32 | 0 |
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| 1932 | 52.3 | 60 | 64.5 | 61 | 40 | 53 | 1.47 | 113 | 0 |
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| 1931 | 48.6 | 121 | 60.9 | 112 | 36.4 | 131 | 1.57 | 110 | 0 |
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| 1930 | 46.8 | 144 | 57.5 | 145 | 36 | 141 | 4.95 | 9 | 0 |
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| 1929 | 48 | 133 | 59.6 | 131 | 36.4 | 131 | 1.46 | 115 | 0 |
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| 1928 | 52.7 | 54 | 63.7 | 79 | 41.7 | 15 | 2.67 | 56 | 0 |
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| 1927 | 51 | 85 | 63.8 | 76 | 38.3 | 95 | 2.01 | 94 | 0 |
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| 1926 | 53 | 50 | 64.4 | 66 | 41.7 | 15 | 1.75 | 103 | 0 |
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| 1925 | 52.5 | 57 | 64.5 | 61 | 40.5 | 37 | 1.56 | 111 | 0 |
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| 1924 | 45.8 | 150 | 57.5 | 145 | 34.1 | 152 | 3.58 | 28 | 0 |
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| 1923 | 50.3 | 102 | 60.8 | 115 | 39.8 | 56 | 2.58 | 59 | 0 |
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| 1922 | 49.8 | 108 | 62.1 | 102 | 37.6 | 113 | 2.00 | 95 | 0 |
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| 1921 | 50.3 | 102 | 61.5 | 108 | 39.2 | 74 | 2.40 | 69 | 0 |
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| 1920 | 49.4 | 112 | 59.6 | 131 | 39.2 | 74 | 2.15 | 86 | 0 |
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| 1919 | 51.2 | 78 | 64.5 | 61 | 37.9 | 107 | 0.70 | 146 | 0 |
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| 1918 | 50.7 | 90 | 63.3 | 85 | 38.1 | 99 | 2.60 | 58 | 0 |
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| 1917 | 42.9 | 154 | 52 | 154 | 33.9 | 154 | 4.65 | 12 | 0 |
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| 1916 | 48.6 | 121 | 60.9 | 112 | 36.2 | 134 | 1.93 | 98 | 0 |
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| 1915 | 46.4 | 146 | 57.2 | 147 | 35.6 | 146 | 2.21 | 82 | 0 |
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| 1914 | 51.1 | 82 | 62.3 | 97 | 39.9 | 55 | 2.10 | 88 | 0 |
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| 1913 | 51.9 | 65 | 64.1 | 72 | 39.8 | 56 | 2.22 | 81 | 0 |
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| 1912 | 50.4 | 99 | 62.7 | 93 | 38 | 104 | 1.37 | 120 | 0 |
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| 1911 | 52.2 | 62 | 65.9 | 49 | 38.5 | 89 | 0.33 | 151 | 0 |
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| 1910 | 49.7 | 109 | 61.3 | 109 | 38 | 104 | 2.34 | 73 | 0 |
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| 1909 | 46.8 | 144 | 59.2 | 135 | 34.4 | 150 | 2.15 | 86 | 0 |
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| 1908 | 47.8 | 136 | 60 | 129 | 35.6 | 146 | 6.19 | 2 | 0 |
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| 1907 | 45.4 | 152 | 56.4 | 150 | 34.3 | 151 | 2.78 | 48 | 0 |
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| 1906 | 50.9 | 87 | 63.8 | 76 | 38.1 | 99 | 1.30 | 125 | 0 |
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| 1905 | 47.2 | 140 | 58 | 140 | 36.5 | 127 | 4.04 | 20 | 0 |
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| 1904 | 49.3 | 113 | 61 | 111 | 37.5 | 116 | 6.66 | 1 | 0 |
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| 1903 | 48 | 133 | 60.4 | 122 | 35.7 | 144 | 0.46 | 148 | 0 |
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| 1902 | 52.8 | 52 | 65.4 | 54 | 40.2 | 47 | 2.51 | 61 | 0 |
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| 1901 | 53.7 | 38 | 66.3 | 43 | 41.1 | 30 | 2.47 | 66 | 0 |
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| 1900 | 54.8 | 20 | 67.9 | 28 | 41.7 | 15 | 0.76 | 144 | 0 |
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| 1899 | 49.5 | 110 | 63 | 90 | 35.9 | 142 | 1.70 | 104 | 0 |
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| 1898 | 47.5 | 138 | 57.2 | 147 | 37.7 | 111 | 3.72 | 26 | 0 |
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| 1897 | 55 | 17 | 68.4 | 23 | 41.6 | 20 | 3.07 | 39 | 0 |
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| 1896 | 51.8 | 68 | 64.3 | 68 | 39.3 | 70 | 2.85 | 46 | 0 |
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| 1895 | 50.5 | 94 | 62.3 | 97 | 38.8 | 81 | 2.73 | 52 | 0 |
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| 1894 | 54.1 | 33 | 66.4 | 40 | 41.7 | 15 | 1.24 | 128 | 0 |
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| 1893 | 48.3 | 127 | 60.5 | 118 | 36.1 | 138 | 1.64 | 108 | 0 |
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| 1892 | 46 | 148 | 55.5 | 151 | 36.6 | 125 | 3.46 | 31 | 0 |
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| 1891 | 51.4 | 76 | 63.5 | 80 | 39.3 | 70 | 4.72 | 11 | 0 |
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| 1890 | 51.7 | 70 | 64.5 | 61 | 38.9 | 78 | 0.81 | 142 | 0 |
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| 1889 | 49.5 | 110 | 61.2 | 110 | 37.8 | 110 | 2.85 | 46 | 0 |
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| 1888 | 48.4 | 125 | 60.4 | 122 | 36.5 | 127 | 3.74 | 25 | 0 |
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| 1887 | 54.3 | 28 | 68.8 | 15 | 39.8 | 56 | 0.94 | 139 | 0 |
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| 1886 | 55.7 | 10 | 72.9 | 2 | 38.5 | 89 | 0.32 | 152 | 0 |
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| 1885 | 48.3 | 127 | 60.4 | 122 | 36.2 | 134 | 1.33 | 123 | 0 |
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| 1884 | 51.7 | 70 | 64.7 | 58 | 38.7 | 85 | 4.83 | 10 | 0 |
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| 1883 | 48.5 | 123 | 60.5 | 118 | 36.5 | 127 | 3.68 | 27 | 0 |
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| 1882 | 48.1 | 132 | 59.5 | 133 | 36.8 | 122 | 2.73 | 52 | 0 |
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| 1881 | 54.7 | 22 | 68 | 27 | 41.5 | 23 | 1.14 | 131 | 0 |
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| 1880 | 53.8 | 37 | 68.8 | 15 | 38.9 | 78 | 0.44 | 149 | 0 |
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| 1879 | 56.3 | 4 | 71.1 | 4 | 41.6 | 20 | 1.36 | 122 | 0 |
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| 1878 | 48.3 | 127 | 60.5 | 118 | 36.2 | 134 | 4.46 | 13 | 0 |
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| 1877 | 51.5 | 75 | 63.4 | 84 | 39.7 | 63 | 2.24 | 78 | 0 |
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| 1876 | 51 | 85 | 64 | 74 | 37.9 | 107 | 2.50 | 62 | 0 |
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| 1875 | 53.3 | 44 | 67.8 | 29 | 38.8 | 81 | 1.20 | 129 | 0 |
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| 1874 | 55.8 | 7 | 71 | 5 | 40.5 | 37 | 1.50 | 112 | 0 |
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| 1873 | 49.1 | 117 | 60.2 | 126 | 38.1 | 99 | 2.41 | 68 | 3 |
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| 1872 | | | | | | | 1.99 | 97 | 31 |
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| 1871 | | | | | | | 2.17 | 85 | 31 |
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