Every 1 September to 10 October in Duluth, MN from 1872 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 | 57.8 | 16 | 67.2 | 13 | 48.5 | 23 | 3.91 | 85 | 0 |
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| 2025 | 58.4 | 10 | 67.5 | 11 | 49.2 | 17 | 2.63 | 112 | 0 |
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| 2024 | 61.4 | 1 | 73.4 | 1 | 49.4 | 16 | 0.32 | 152 | 0 |
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| 2023 | 59.8 | 5 | 67.6 | 10 | 52.1 | 2 | 10.62 | 2 | 0 |
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| 2022 | 56.6 | 31 | 66.1 | 22 | 47.2 | 40 | 2.76 | 109 | 0 |
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| 2021 | 60.3 | 2 | 70.1 | 2 | 50.5 | 7 | 4.91 | 61 | 0 |
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| 2020 | 53 | 100 | 63.2 | 63 | 42.8 | 124 | 0.85 | 149 | 0 |
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| 2019 | 57.6 | 17 | 65.1 | 34 | 50 | 12 | 8.32 | 7 | 0 |
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| 2018 | 55.2 | 46 | 62.4 | 84 | 48 | 31 | 7.02 | 22 | 0 |
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| 2017 | 56.4 | 36 | 65.7 | 28 | 47.1 | 47 | 5.70 | 43 | 0 |
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| 2016 | 57.9 | 14 | 66.4 | 18 | 49.5 | 15 | 4.18 | 76 | 0 |
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| 2015 | 58.1 | 12 | 67.3 | 12 | 48.9 | 20 | 7.04 | 21 | 0 |
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| 2014 | 54 | 70 | 62.6 | 77 | 45.4 | 74 | 2.58 | 116 | 0 |
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| 2013 | 58.7 | 7 | 68.3 | 7 | 49.2 | 17 | 3.02 | 102 | 0 |
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| 2012 | 53.1 | 97 | 64.7 | 37 | 41.5 | 140 | 1.16 | 147 | 0 |
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| 2011 | 56.8 | 30 | 67.2 | 13 | 46.5 | 54 | 1.61 | 143 | 0 |
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| 2010 | 52.5 | 112 | 61.9 | 97 | 43.2 | 111 | 3.62 | 91 | 0 |
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| 2009 | 57 | 25 | 65.5 | 30 | 48.4 | 24 | 2.86 | 105 | 0 |
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| 2008 | 53.8 | 75 | 62.6 | 77 | 45.1 | 79 | 6.03 | 40 | 0 |
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| 2007 | 56.5 | 35 | 65.8 | 26 | 47.2 | 40 | 7.41 | 14 | 0 |
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| 2006 | 53.5 | 85 | 63.6 | 57 | 43.3 | 109 | 3.63 | 90 | 0 |
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| 2005 | 57 | 25 | 66.3 | 20 | 47.6 | 35 | 7.82 | 10 | 0 |
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| 2004 | 56.6 | 31 | 66.1 | 22 | 47.2 | 40 | 5.17 | 55 | 0 |
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| 2003 | 54.8 | 56 | 64.6 | 39 | 45.1 | 79 | 3.53 | 95 | 0 |
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| 2002 | 53.8 | 75 | 62.8 | 72 | 44.9 | 84 | 5.58 | 46 | 0 |
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| 2001 | 53.2 | 95 | 63 | 69 | 43.5 | 106 | 2.63 | 112 | 0 |
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| 2000 | 51 | 134 | 61.6 | 105 | 40.5 | 146 | 2.29 | 125 | 0 |
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| 1999 | 51.6 | 129 | 61 | 116 | 42.2 | 132 | 6.41 | 29 | 0 |
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| 1998 | 56.2 | 38 | 66.2 | 21 | 46.2 | 61 | 4.18 | 76 | 0 |
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| 1997 | 56.6 | 31 | 66.1 | 22 | 47.2 | 40 | 2.30 | 123 | 0 |
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| 1996 | 53.2 | 95 | 61.2 | 109 | 45.2 | 78 | 5.36 | 49 | 0 |
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| 1995 | 52.9 | 101 | 61.9 | 97 | 44 | 97 | 5.55 | 48 | 0 |
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| 1994 | 55.5 | 45 | 64.1 | 45 | 46.9 | 49 | 6.39 | 30 | 0 |
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| 1993 | 47.9 | 151 | 57.3 | 149 | 38.4 | 152 | 1.96 | 136 | 0 |
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| 1992 | 52.9 | 101 | 63.1 | 66 | 42.7 | 127 | 4.75 | 69 | 0 |
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| 1991 | 50.9 | 135 | 60.3 | 127 | 41.6 | 136 | 9.84 | 3 | 0 |
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| 1990 | 53.4 | 87 | 63.9 | 49 | 42.9 | 118 | 7.50 | 12 | 0 |
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| 1989 | 52.3 | 114 | 63.1 | 66 | 41.6 | 136 | 4.88 | 62 | 0 |
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| 1988 | 52.6 | 109 | 62.6 | 77 | 42.7 | 127 | 6.28 | 31 | 0 |
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| 1987 | 53.4 | 87 | 63.7 | 54 | 43.1 | 114 | 3.49 | 96 | 0 |
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| 1986 | 50.6 | 137 | 59.7 | 132 | 41.6 | 136 | 6.43 | 28 | 0 |
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| 1985 | 49.3 | 148 | 58.4 | 142 | 40.2 | 147 | 6.86 | 25 | 0 |
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| 1984 | 51.8 | 124 | 61.2 | 109 | 42.3 | 131 | 3.96 | 84 | 0 |
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| 1983 | 54.4 | 65 | 61.7 | 100 | 47.1 | 47 | 6.91 | 24 | 0 |
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| 1982 | 52.7 | 105 | 60.5 | 122 | 44.9 | 84 | 8.56 | 5 | 0 |
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| 1981 | 50.5 | 138 | 59.3 | 136 | 41.8 | 134 | 4.14 | 79 | 0 |
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| 1980 | 51.3 | 132 | 60.5 | 122 | 42.2 | 132 | 6.82 | 26 | 0 |
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| 1979 | 53.5 | 85 | 63 | 69 | 43.9 | 98 | 2.29 | 125 | 0 |
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| 1978 | 55.1 | 48 | 64.4 | 42 | 45.8 | 66 | 2.05 | 133 | 0 |
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| 1977 | 50.4 | 140 | 57.9 | 147 | 42.9 | 118 | 8.46 | 6 | 0 |
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| 1976 | 52.3 | 114 | 63.8 | 52 | 40.7 | 145 | 2.22 | 130 | 0 |
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| 1975 | 51.3 | 132 | 59.9 | 129 | 42.8 | 124 | 2.54 | 117 | 0 |
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| 1974 | 46.1 | 153 | 55 | 153 | 37.1 | 153 | 1.43 | 145 | 0 |
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| 1973 | 54 | 70 | 63.1 | 66 | 44.8 | 87 | 7.35 | 16 | 0 |
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| 1972 | 49.3 | 148 | 59.4 | 134 | 39.1 | 150 | 5.68 | 44 | 0 |
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| 1971 | 55.6 | 43 | 65 | 35 | 46.3 | 58 | 3.44 | 97 | 0 |
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| 1970 | 53.1 | 97 | 62.4 | 84 | 43.8 | 100 | 5.00 | 59 | 0 |
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| 1969 | 55.2 | 46 | 64.7 | 37 | 45.7 | 67 | 4.76 | 67 | 0 |
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| 1968 | 54.3 | 67 | 63.6 | 57 | 44.9 | 84 | 6.07 | 38 | 0 |
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| 1967 | 53.3 | 91 | 63.5 | 61 | 43.2 | 111 | 2.15 | 132 | 0 |
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| 1966 | 53.1 | 97 | 63.7 | 54 | 42.6 | 129 | 2.21 | 131 | 0 |
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| 1965 | 47.3 | 152 | 56 | 152 | 38.7 | 151 | 6.07 | 38 | 0 |
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| 1964 | 50 | 145 | 59.2 | 138 | 40.8 | 144 | 7.16 | 19 | 0 |
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| 1963 | 58.2 | 11 | 69 | 4 | 47.4 | 38 | 2.80 | 108 | 0 |
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| 1962 | 51.9 | 122 | 62.2 | 93 | 41.6 | 136 | 3.43 | 98 | 0 |
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| 1961 | 53.6 | 82 | 64.2 | 43 | 42.9 | 118 | 4.00 | 83 | 0 |
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| 1960 | 54.8 | 56 | 64.9 | 36 | 44.8 | 87 | 1.66 | 142 | 0 |
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| 1959 | 52.7 | 105 | 61.7 | 100 | 43.8 | 100 | 6.17 | 34 | 0 |
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| 1958 | 52.8 | 103 | 62 | 96 | 43.5 | 106 | 5.10 | 56 | 0 |
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| 1957 | 51.4 | 130 | 61.7 | 100 | 41.2 | 142 | 3.24 | 99 | 0 |
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| 1956 | 50 | 145 | 60.6 | 120 | 39.4 | 149 | 2.41 | 120 | 0 |
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| 1955 | 53.7 | 79 | 63.6 | 57 | 43.7 | 104 | 5.57 | 47 | 0 |
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| 1954 | 50.9 | 135 | 58.7 | 140 | 43.1 | 114 | 3.11 | 101 | 0 |
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| 1953 | 53.7 | 79 | 63.7 | 54 | 43.8 | 100 | 0.93 | 148 | 0 |
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| 1952 | 51.8 | 124 | 62.3 | 88 | 41.2 | 142 | 0.21 | 154 | 0 |
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| 1951 | 50 | 145 | 58.3 | 144 | 41.8 | 134 | 6.96 | 23 | 0 |
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| 1950 | 52.6 | 109 | 62.3 | 88 | 42.9 | 118 | 4.80 | 65 | 0 |
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| 1949 | 52.7 | 105 | 62.5 | 81 | 42.9 | 118 | 7.79 | 11 | 0 |
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| 1948 | 57 | 25 | 68.8 | 5 | 45.1 | 79 | 0.60 | 151 | 0 |
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| 1947 | 54.5 | 62 | 62.6 | 77 | 46.4 | 55 | 1.74 | 140 | 0 |
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| 1946 | 53.6 | 82 | 62.3 | 88 | 45 | 82 | 7.17 | 17 | 0 |
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| 1945 | 52.3 | 114 | 61.6 | 105 | 43.1 | 114 | 5.20 | 53 | 0 |
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| 1944 | 53.6 | 82 | 61.2 | 109 | 46.1 | 63 | 2.85 | 106 | 0 |
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| 1943 | 53.8 | 75 | 63.8 | 52 | 43.9 | 98 | 2.00 | 135 | 0 |
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| 1942 | 53.4 | 87 | 62.2 | 93 | 44.7 | 89 | 1.58 | 144 | 0 |
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| 1941 | 55 | 51 | 62.4 | 84 | 47.5 | 36 | 7.42 | 13 | 0 |
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| 1940 | 58.6 | 9 | 68 | 8 | 49.2 | 17 | 3.72 | 89 | 0 |
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| 1939 | 55.6 | 43 | 64.1 | 45 | 47.2 | 40 | 2.61 | 114 | 0 |
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| 1938 | 56.6 | 31 | 65.3 | 33 | 47.9 | 33 | 2.85 | 106 | 0 |
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| 1937 | 54 | 70 | 62.5 | 81 | 45.4 | 74 | 4.97 | 60 | 0 |
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| 1936 | 56.2 | 38 | 65.6 | 29 | 46.9 | 49 | 2.04 | 134 | 0 |
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| 1935 | 49.2 | 150 | 58.3 | 144 | 40.1 | 148 | 2.25 | 129 | 0 |
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| 1934 | 52.5 | 112 | 60.7 | 119 | 44.3 | 93 | 5.01 | 58 | 0 |
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| 1933 | 57.2 | 20 | 66.4 | 18 | 48.1 | 29 | 5.19 | 54 | 0 |
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| 1932 | 53.9 | 74 | 64 | 47 | 43.8 | 100 | 0.68 | 150 | 0 |
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| 1931 | 60.2 | 3 | 69.5 | 3 | 50.8 | 4 | 4.87 | 63 | 0 |
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| 1930 | 54.7 | 59 | 63.6 | 57 | 45.7 | 67 | 5.28 | 50 | 0 |
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| 1929 | 52.1 | 120 | 61.2 | 109 | 42.9 | 118 | 5.21 | 52 | 0 |
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| 1928 | 51.7 | 127 | 60.3 | 127 | 43.1 | 114 | 4.49 | 74 | 0 |
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| 1927 | 54.4 | 65 | 62.4 | 84 | 46.4 | 55 | 3.88 | 87 | 0 |
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| 1926 | 50.4 | 140 | 57.6 | 148 | 43.2 | 111 | 7.05 | 20 | 0 |
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| 1925 | 52.2 | 118 | 59.9 | 129 | 44.5 | 90 | 4.66 | 70 | 0 |
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| 1924 | 51.9 | 122 | 60.4 | 125 | 43.3 | 109 | 4.76 | 67 | 0 |
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| 1923 | 55.1 | 48 | 63.9 | 49 | 46.3 | 58 | 2.61 | 114 | 0 |
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| 1922 | 57.6 | 17 | 66.9 | 15 | 48.3 | 26 | 2.49 | 118 | 0 |
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| 1921 | 54.6 | 60 | 62.8 | 72 | 46.4 | 55 | 3.23 | 100 | 0 |
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| 1920 | 59.4 | 6 | 68.6 | 6 | 50.2 | 10 | 1.31 | 146 | 0 |
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| 1919 | 54 | 70 | 62.5 | 81 | 45.6 | 71 | 2.31 | 122 | 0 |
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| 1918 | 50.3 | 143 | 59.3 | 136 | 41.3 | 141 | 1.76 | 139 | 0 |
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| 1917 | 50.4 | 140 | 58.3 | 144 | 42.4 | 130 | 2.72 | 110 | 0 |
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| 1916 | 52.2 | 118 | 61.5 | 107 | 42.8 | 124 | 4.29 | 75 | 0 |
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| 1915 | 52.3 | 114 | 60.4 | 125 | 44.2 | 95 | 4.82 | 64 | 0 |
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| 1914 | 55.8 | 41 | 62.8 | 72 | 48.8 | 21 | 3.55 | 93 | 0 |
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| 1913 | 53.7 | 79 | 61.7 | 100 | 45.7 | 67 | 6.10 | 37 | 0 |
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| 1912 | 54.5 | 62 | 63.2 | 63 | 45.9 | 65 | 1.82 | 138 | 0 |
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| 1911 | 51.8 | 124 | 59.4 | 134 | 44.3 | 93 | 4.14 | 79 | 0 |
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| 1910 | 54.9 | 53 | 64 | 47 | 45.7 | 67 | 4.54 | 73 | 0 |
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| 1909 | 54.6 | 60 | 63.2 | 63 | 46 | 64 | 4.59 | 72 | 0 |
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| 1908 | 57 | 25 | 66.9 | 15 | 47.2 | 40 | 3.56 | 92 | 0 |
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| 1907 | 50.5 | 138 | 57.3 | 149 | 43.7 | 104 | 7.41 | 14 | 0 |
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| 1906 | 56.9 | 29 | 65.5 | 30 | 48.2 | 27 | 3.91 | 85 | 0 |
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| 1905 | 57.9 | 14 | 65.8 | 26 | 50.1 | 11 | 8.26 | 8 | 0 |
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| 1904 | 50.3 | 143 | 57.1 | 151 | 43.4 | 108 | 5.95 | 42 | 0 |
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| 1903 | 53.3 | 91 | 60.5 | 122 | 46.2 | 61 | 8.25 | 9 | 0 |
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| 1902 | 52.6 | 109 | 59.7 | 132 | 45.4 | 74 | 1.71 | 141 | 0 |
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| 1901 | 54.8 | 56 | 61.2 | 109 | 48.4 | 24 | 3.54 | 94 | 0 |
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| 1900 | 57.4 | 19 | 64.5 | 41 | 50.4 | 9 | 6.22 | 33 | 0 |
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| 1899 | 54.3 | 67 | 61.4 | 108 | 47.2 | 40 | 2.26 | 128 | 0 |
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| 1898 | 57.1 | 21 | 66 | 25 | 48.2 | 27 | 2.87 | 104 | 0 |
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| 1897 | 60.2 | 3 | 67.7 | 9 | 52.7 | 1 | 3.81 | 88 | 0 |
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| 1896 | 52.1 | 120 | 59 | 139 | 45.3 | 77 | 2.28 | 127 | 0 |
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| 1895 | 55.1 | 48 | 62.3 | 88 | 48 | 31 | 5.98 | 41 | 0 |
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| 1894 | 56.2 | 38 | 63.9 | 49 | 48.6 | 22 | 4.16 | 78 | 0 |
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| 1893 | 54.5 | 62 | 61.2 | 109 | 47.8 | 34 | 2.45 | 119 | 0 |
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| 1892 | 58 | 13 | 65.5 | 30 | 50.5 | 7 | 0.32 | 152 | 0 |
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| 1891 | 58.7 | 7 | 66.6 | 17 | 50.8 | 4 | 4.04 | 81 | 0 |
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| 1890 | 54.2 | 69 | 61.9 | 97 | 46.6 | 52 | 2.93 | 103 | 0 |
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| 1889 | 52.7 | 105 | 59.9 | 129 | 45.5 | 72 | 4.03 | 82 | 0 |
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| 1888 | 53.3 | 91 | 61 | 116 | 45.5 | 72 | 2.30 | 123 | 0 |
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| 1887 | 53.8 | 75 | 61 | 116 | 46.6 | 52 | 5.66 | 45 | 0 |
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| 1886 | 53.3 | 91 | 62.1 | 95 | 44.5 | 90 | 6.59 | 27 | 0 |
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| 1885 | 52.8 | 103 | 61.2 | 109 | 44.4 | 92 | 2.37 | 121 | 0 |
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| 1884 | 57.1 | 21 | 63.5 | 61 | 50.7 | 6 | 7.17 | 17 | 0 |
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| 1883 | 53.4 | 87 | 60.6 | 120 | 46.3 | 58 | 4.60 | 71 | 0 |
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| 1882 | 57.1 | 21 | 62.3 | 88 | 52 | 3 | 2.65 | 111 | 0 |
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| 1881 | 54.9 | 53 | 61.7 | 100 | 48.1 | 29 | 11.59 | 1 | 0 |
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| 1880 | 55.8 | 41 | 64.2 | 43 | 47.5 | 36 | 1.85 | 137 | 0 |
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| 1879 | 55 | 51 | 62.8 | 72 | 47.3 | 39 | 6.28 | 31 | 0 |
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| 1878 | 54.9 | 53 | 63 | 69 | 46.9 | 49 | 6.13 | 36 | 0 |
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| 1877 | 56.3 | 37 | 62.8 | 72 | 49.8 | 13 | | | 0 |
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| 1876 | 51.7 | 127 | 58.4 | 142 | 45 | 82 | 9.54 | 4 | 0 |
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| 1875 | 51.4 | 130 | 58.7 | 140 | 44.2 | 95 | 4.79 | 66 | 0 |
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| 1874 | 57.1 | 21 | 64.6 | 39 | 49.6 | 14 | 6.17 | 34 | 0 |
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| 1873 | | | | | | | 5.26 | 51 | 40 |
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| 1872 | | | | | | | 5.04 | 57 | 40 |
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