Every May in Cedar Rapids, IA from 1893 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 | 61.3 | 56 | 74 | 41 | 48.6 | 84 | 1.86 | 112 | 0 |
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| 2025 | 61.3 | 56 | 73.8 | 44 | 48.9 | 78 | 2.29 | 101 | 0 |
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| 2024 | 63.1 | 33 | 75.1 | 30 | 51.1 | 40 | 5.44 | 24 | 0 |
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| 2023 | 63.4 | 29 | 76.9 | 18 | 49.9 | 57 | 2.29 | 101 | 0 |
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| 2022 | 61.8 | 48 | 72.4 | 59 | 51.2 | 37 | 2.04 | 109 | 1 |
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| 2021 | 58.2 | 97 | 68.1 | 108 | 48.4 | 89 | 2.70 | 90 | 0 |
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| 2020 | 57.1 | 113 | 66.6 | 121 | 47.5 | 102 | 2.49 | 95 | 0 |
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| 2019 | 57.3 | 109 | 67.4 | 116 | 47.2 | 105 | 7.99 | 5 | 0 |
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| 2018 | 68.5 | 2 | 79.8 | 3 | 57.1 | 2 | 4.55 | 41 | 0 |
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| 2017 | 58.5 | 92 | 69.8 | 95 | 47.3 | 104 | 3.66 | 59 | 0 |
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| 2016 | 60.5 | 71 | 72 | 63 | 49 | 75 | 3.30 | 73 | 0 |
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| 2015 | 61.6 | 52 | 71.5 | 66 | 51.7 | 32 | 3.63 | 61 | 3 |
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| 2014 | 61 | 61 | 72.2 | 62 | 49.8 | 60 | 2.23 | 104 | 0 |
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| 2013 | 60.8 | 65 | 71 | 73 | 50.7 | 46 | 7.35 | 10 | 0 |
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| 2012 | 65.2 | 16 | 77.4 | 14 | 53 | 24 | 1.96 | 110 | 0 |
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| 2011 | 59.7 | 83 | 70.8 | 77 | 48.6 | 84 | 3.62 | 63 | 0 |
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| 2010 | 60.7 | 69 | 71 | 73 | 50.4 | 52 | 3.19 | 75 | 0 |
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| 2009 | 59.4 | 88 | 70.4 | 84 | 48.4 | 89 | 3.58 | 66 | 0 |
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| 2008 | 57 | 114 | 68 | 109 | 45.9 | 113 | 6.42 | 16 | 0 |
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| 2007 | 64.7 | 20 | 76.1 | 21 | 53.3 | 21 | 3.44 | 69 | 0 |
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| 2006 | 59.8 | 81 | 70.4 | 84 | 49.1 | 73 | 1.67 | 118 | 0 |
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| 2005 | 57.8 | 104 | 69.3 | 100 | 46.3 | 110 | 3.08 | 81 | 0 |
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| 2004 | 61.9 | 47 | 73.1 | 52 | 50.8 | 44 | 7.44 | 7 | 0 |
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| 2003 | 57.6 | 106 | 68.5 | 105 | 46.8 | 107 | 4.34 | 42 | 0 |
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| 2002 | 57 | 114 | 68.6 | 102 | 45.5 | 120 | 4.02 | 48 | 0 |
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| 2001 | 60.9 | 63 | 70.4 | 84 | 51.3 | 34 | 6.91 | 12 | 0 |
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| 2000 | 62.1 | 42 | 73.2 | 50 | 51 | 43 | 4.78 | 36 | 0 |
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| 1999 | 60.5 | 71 | 70.3 | 88 | 50.8 | 44 | 4.30 | 43 | 0 |
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| 1998 | 64.5 | 24 | 74.5 | 35 | 54.4 | 11 | 4.66 | 38 | 0 |
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| 1997 | 54.2 | 132 | 65.9 | 126 | 42.6 | 131 | 4.08 | 46 | 0 |
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| 1996 | 56.2 | 122 | 64.6 | 134 | 47.8 | 99 | 10.07 | 1 | 0 |
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| 1995 | 59.4 | 88 | 69.4 | 99 | 49.4 | 68 | 5.15 | 31 | 0 |
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| 1994 | 61.1 | 60 | 73.9 | 43 | 48.4 | 89 | 1.77 | 115 | 0 |
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| 1993 | 60.8 | 65 | 71 | 73 | 50.6 | 48 | 5.43 | 25 | 0 |
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| 1992 | 61.4 | 54 | 74.2 | 38 | 48.6 | 84 | 0.72 | 128 | 0 |
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| 1991 | 66.2 | 8 | 76.1 | 21 | 56.4 | 4 | 3.89 | 55 | 0 |
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| 1990 | 56.6 | 120 | 66.3 | 125 | 46.9 | 106 | 7.43 | 8 | 0 |
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| 1989 | 59.4 | 88 | 70.8 | 77 | 48 | 97 | 2.30 | 100 | 0 |
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| 1988 | 64.6 | 22 | 78.6 | 5 | 50.5 | 49 | 1.07 | 126 | 0 |
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| 1987 | 65.2 | 16 | 77.1 | 16 | 53.3 | 21 | 3.56 | 67 | 0 |
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| 1986 | 62.1 | 42 | 71.5 | 66 | 52.6 | 27 | 7.88 | 6 | 0 |
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| 1985 | 62.4 | 39 | 74.3 | 37 | 50.5 | 49 | 1.70 | 117 | 0 |
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| 1984 | 56.6 | 120 | 67.5 | 114 | 45.8 | 115 | 3.67 | 58 | 0 |
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| 1983 | 58 | 100 | 67.6 | 113 | 48.4 | 89 | 3.54 | 68 | 0 |
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| 1982 | 64.1 | 26 | 74 | 41 | 54.3 | 13 | 4.00 | 49 | 0 |
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| 1981 | 59.5 | 87 | 70.8 | 77 | 48.2 | 94 | 0.34 | 130 | 0 |
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| 1980 | 62 | 46 | 74.2 | 38 | 49.9 | 57 | 1.85 | 114 | 0 |
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| 1979 | 60.8 | 65 | 72.5 | 56 | 49 | 75 | 3.16 | 76 | 0 |
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| 1978 | 60.5 | 71 | 70.3 | 88 | 50.7 | 46 | 2.80 | 88 | 0 |
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| 1977 | 66.9 | 4 | 78.6 | 5 | 55.2 | 6 | 2.29 | 101 | 0 |
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| 1976 | 56.9 | 116 | 68.2 | 106 | 45.6 | 119 | 2.95 | 84 | 0 |
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| 1975 | 62.3 | 41 | 74.2 | 38 | 50.4 | 52 | 3.75 | 56 | 0 |
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| 1974 | 57.2 | 111 | 65.5 | 131 | 48.9 | 78 | 8.68 | 3 | 0 |
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| 1973 | 58.1 | 99 | 66.9 | 120 | 49.3 | 71 | 6.06 | 19 | 0 |
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| 1972 | 63.9 | 28 | 73.7 | 45 | 54 | 14 | 4.60 | 40 | 0 |
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| 1971 | 58 | 100 | 69.7 | 96 | 46.4 | 109 | 2.54 | 92 | 0 |
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| 1970 | 64.6 | 22 | 76 | 23 | 53.3 | 21 | 6.59 | 13 | 0 |
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| 1969 | 61.8 | 48 | 72.5 | 56 | 51.1 | 40 | 3.74 | 57 | 0 |
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| 1968 | 55.9 | 124 | 67.2 | 118 | 44.6 | 124 | 3.32 | 72 | 0 |
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| 1967 | 56.7 | 119 | 67.8 | 111 | 45.7 | 117 | 1.44 | 122 | 0 |
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| 1966 | 54.2 | 132 | 65.4 | 132 | 42.9 | 130 | 4.88 | 35 | 0 |
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| 1965 | 64.9 | 18 | 75.5 | 26 | 54.4 | 11 | 5.29 | 26 | 0 |
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| 1964 | 65.9 | 12 | 77.9 | 12 | 53.9 | 16 | 2.06 | 108 | 0 |
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| 1963 | 60.1 | 77 | 71.1 | 72 | 49.1 | 73 | 1.64 | 120 | 0 |
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| 1962 | 66.3 | 6 | 75.9 | 24 | 56.6 | 3 | 7.36 | 9 | 0 |
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| 1961 | 56 | 123 | 68.2 | 106 | 43.9 | 128 | 0.90 | 127 | 0 |
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| 1960 | 58.3 | 94 | 68.6 | 102 | 48.1 | 95 | 4.74 | 37 | 0 |
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| 1959 | 63 | 34 | 72.5 | 56 | 53.4 | 20 | 7.02 | 11 | 0 |
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| 1958 | 62.1 | 42 | 74.6 | 33 | 49.7 | 61 | 2.21 | 105 | 0 |
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| 1957 | 58.3 | 94 | 67.2 | 118 | 49.4 | 68 | 5.16 | 29 | 0 |
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| 1956 | 61.4 | 54 | 72.6 | 55 | 50.1 | 55 | 3.95 | 52 | 0 |
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| 1955 | 62.4 | 39 | 73.5 | 46 | 51.3 | 34 | 3.62 | 63 | 0 |
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| 1954 | 55.2 | 129 | 65.7 | 129 | 44.7 | 123 | 3.10 | 80 | 0 |
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| 1953 | 60.5 | 71 | 71.5 | 66 | 49.4 | 68 | 2.85 | 86 | 0 |
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| 1952 | 59.6 | 85 | 70.4 | 84 | 48.9 | 78 | 3.90 | 53 | 0 |
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| 1951 | 63 | 34 | 74.8 | 31 | 51.3 | 34 | 5.17 | 28 | 0 |
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| 1950 | 61 | 61 | 72.4 | 59 | 49.6 | 63 | 3.63 | 61 | 0 |
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| 1949 | 63.3 | 31 | 75.4 | 27 | 51.2 | 37 | 2.40 | 99 | 0 |
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| 1948 | 57.9 | 103 | 69.1 | 101 | 46.6 | 108 | | | 0 |
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| 1947 | 55.5 | 127 | 66.5 | 123 | 44.5 | 125 | | | 0 |
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| 1946 | 56.9 | 116 | 67.5 | 114 | 46.2 | 111 | | | 0 |
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| 1945 | 54.7 | 131 | 65.9 | 126 | 43.6 | 129 | 5.04 | 33 | 0 |
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| 1944 | 64.8 | 19 | 74.8 | 31 | 54.8 | 9 | 5.89 | 22 | 0 |
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| 1943 | 57.4 | 108 | 67.3 | 117 | 47.6 | 101 | 4.03 | 47 | 0 |
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| 1942 | 60.2 | 76 | 70.7 | 80 | 49.7 | 61 | 2.93 | 85 | 0 |
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| 1941 | 66.1 | 9 | 78.2 | 10 | 53.9 | 16 | 2.55 | 91 | 0 |
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| 1940 | 58.2 | 97 | 70.7 | 80 | 45.7 | 117 | 2.46 | 97 | 0 |
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| 1939 | 65.3 | 15 | 78.5 | 7 | 52.1 | 28 | 3.61 | 65 | 0 |
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| 1938 | 59.7 | 83 | 69.9 | 93 | 49.5 | 66 | 5.00 | 34 | 0 |
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| 1937 | 61.3 | 56 | 72.4 | 59 | 50.3 | 54 | 4.15 | 45 | 0 |
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| 1936 | 66.1 | 9 | 78.3 | 9 | 53.9 | 16 | 2.13 | 106 | 0 |
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| 1935 | 55.7 | 125 | 65.7 | 129 | 45.8 | 115 | 4.25 | 44 | 0 |
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| 1934 | 67.6 | 3 | 82.6 | 1 | 52.7 | 26 | 0.64 | 129 | 0 |
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| 1933 | 60.3 | 75 | 71.2 | 71 | 49.3 | 71 | 6.54 | 14 | 0 |
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| 1932 | 62.9 | 36 | 77.1 | 16 | 48.7 | 83 | 1.66 | 119 | 0 |
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| 1931 | 57.3 | 109 | 70.3 | 88 | 44.3 | 126 | 1.74 | 116 | 0 |
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| 1930 | 61.3 | 56 | 73.5 | 46 | 49 | 75 | 5.28 | 27 | 0 |
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| 1929 | 58 | 100 | 69.7 | 96 | 46.1 | 112 | 1.32 | 123 | 1 |
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| 1928 | 62.1 | 42 | 76.4 | 20 | 47.7 | 100 | 2.54 | 92 | 0 |
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| 1927 | 58.3 | 94 | 68.6 | 102 | 48.1 | 95 | 5.76 | 23 | 0 |
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| 1926 | 64.4 | 25 | 78.9 | 4 | 50 | 56 | 1.55 | 121 | 0 |
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| 1925 | 57.6 | 106 | 75.3 | 28 | 40 | 134 | 1.15 | 125 | 0 |
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| 1924 | 55.1 | 130 | 69.6 | 98 | 40.7 | 133 | 1.26 | 124 | 0 |
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| 1923 | 59.9 | 79 | 71.3 | 70 | 48.5 | 87 | 0.05 | 131 | 0 |
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| 1922 | 66.3 | 6 | 76.7 | 19 | 55.9 | 5 | 5.08 | 32 | 0 |
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| 1921 | 66.7 | 5 | 78.5 | 7 | 54.9 | 8 | 2.48 | 96 | 0 |
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| 1920 | 60.7 | 69 | 72.8 | 53 | 48.5 | 87 | 1.90 | 111 | 0 |
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| 1919 | 59.2 | 91 | 70.2 | 92 | 48.3 | 93 | 3.90 | 53 | 0 |
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| 1918 | 64.7 | 20 | 77.6 | 13 | 51.9 | 30 | 6.04 | 20 | 0 |
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| 1917 | 55.3 | 128 | 66.4 | 124 | 44.3 | 126 | 3.96 | 51 | 0 |
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| 1916 | 59.8 | 81 | 69.9 | 93 | 49.6 | 63 | 5.16 | 29 | 0 |
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| 1915 | 55.7 | 125 | 65.9 | 126 | 45.5 | 120 | 6.51 | 15 | 0 |
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| 1914 | 62.9 | 36 | 74.6 | 33 | 51.2 | 37 | 2.43 | 98 | 0 |
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| 1913 | 60.1 | 77 | 70.6 | 82 | 49.6 | 63 | 6.03 | 21 | 0 |
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| 1912 | 63.2 | 32 | 74.4 | 36 | 52 | 29 | 3.14 | 77 | 0 |
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| 1911 | 66 | 11 | 78.2 | 10 | 53.8 | 19 | 3.64 | 60 | 2 |
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| 1910 | 56.9 | 116 | 67.8 | 111 | 45.9 | 113 | 2.51 | 94 | 0 |
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| 1909 | 57.7 | 105 | 67.9 | 110 | 47.5 | 102 | 3.05 | 83 | 0 |
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| 1908 | 59.6 | 85 | 70.3 | 88 | 48.9 | 78 | 6.11 | 17 | 0 |
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| 1907 | 52.8 | 134 | 64.7 | 133 | 40.9 | 132 | 3.12 | 79 | 0 |
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| 1906 | 61.5 | 53 | 73.5 | 46 | 49.5 | 66 | 3.28 | 74 | 0 |
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| 1905 | 59.9 | 79 | 70.9 | 76 | 48.8 | 82 | 8.31 | 4 | 0 |
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| 1904 | 60.9 | 63 | 71.8 | 64 | 49.9 | 57 | 3.36 | 71 | 0 |
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| 1903 | 64.1 | 26 | 73.4 | 49 | 54.8 | 9 | 6.11 | 17 | 0 |
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| 1902 | 65.4 | 14 | 75.7 | 25 | 55 | 7 | 4.61 | 39 | 0 |
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| 1901 | 61.8 | 48 | 73.2 | 50 | 50.5 | 49 | 1.86 | 112 | 0 |
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| 1900 | 65.7 | 13 | 77.3 | 15 | 54 | 14 | 3.13 | 78 | 0 |
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| 1899 | 63.4 | 29 | 75.2 | 29 | 51.5 | 33 | 9.21 | 2 | 0 |
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| 1898 | 60.8 | 65 | 70.6 | 82 | 51.1 | 40 | 3.41 | 70 | 0 |
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| 1897 | 58.5 | 92 | 71.5 | 66 | 45.5 | 120 | 2.10 | 107 | 0 |
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| 1896 | 69.7 | 1 | 82.1 | 2 | 57.4 | 1 | 3.99 | 50 | 0 |
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| 1895 | 62.5 | 38 | 72.7 | 54 | 52.8 | 25 | 2.84 | 87 | 1 |
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| 1894 | 61.8 | 48 | 71.8 | 64 | 51.9 | 30 | 3.08 | 81 | 2 |
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| 1893 | 57.2 | 111 | 66.6 | 121 | 47.9 | 98 | 2.79 | 89 | 0 |
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