Every February in Chicago, IL 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 | 33.1 | 25 | 41.8 | 15 | 24.3 | 40 | 0.16 | 154 | 0 |
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| 2025 | 27.2 | 77 | 34.2 | 81 | 20.3 | 71 | 0.52 | 143 | 0 |
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| 2024 | 39.5 | 1 | 49.2 | 1 | 29.7 | 7 | 0.65 | 137 | 0 |
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| 2023 | 33.9 | 19 | 42.2 | 12 | 25.5 | 30 | 3.83 | 8 | 0 |
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| 2022 | 27.4 | 74 | 35.3 | 68 | 19.5 | 83 | 2.59 | 28 | 0 |
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| 2021 | 20.2 | 135 | 27.4 | 136 | 13 | 134 | 1.25 | 104 | 0 |
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| 2020 | 30.2 | 45 | 37.3 | 42 | 23.1 | 49 | 0.77 | 128 | 0 |
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| 2019 | 25.9 | 101 | 34 | 84 | 17.8 | 107 | 2.81 | 24 | 0 |
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| 2018 | 28.8 | 55 | 38 | 39 | 19.6 | 79 | 4.64 | 4 | 0 |
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| 2017 | 38 | 4 | 47.7 | 2 | 28.4 | 12 | 1.52 | 89 | 0 |
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| 2016 | 30.4 | 41 | 37.2 | 43 | 23.5 | 45 | 1.23 | 106 | 0 |
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| 2015 | 14.6 | 153 | 23.4 | 153 | 5.7 | 153 | 1.45 | 94 | 0 |
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| 2014 | 17.3 | 145 | 25.7 | 143 | 8.9 | 149 | 2.48 | 33 | 0 |
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| 2013 | 26.1 | 96 | 33.1 | 98 | 19.1 | 93 | 2.96 | 21 | 0 |
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| 2012 | 32.9 | 26 | 40.2 | 21 | 25.6 | 28 | 1.64 | 75 | 0 |
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| 2011 | 26.2 | 93 | 32.7 | 100 | 19.6 | 79 | 3.52 | 11 | 0 |
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| 2010 | 26.7 | 84 | 32.3 | 105 | 21.1 | 61 | 1.64 | 75 | 0 |
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| 2009 | 28.2 | 63 | 36.9 | 45 | 19.6 | 79 | 3.39 | 15 | 0 |
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| 2008 | 23 | 117 | 29.7 | 123 | 16.4 | 116 | 3.53 | 10 | 0 |
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| 2007 | 17.9 | 142 | 24.4 | 147 | 11.5 | 139 | 1.61 | 80 | 0 |
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| 2006 | 28.2 | 63 | 36.3 | 51 | 20 | 75 | 1.80 | 67 | 0 |
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| 2005 | 32.4 | 27 | 38.9 | 34 | 26 | 24 | 2.19 | 48 | 0 |
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| 2004 | 27.4 | 74 | 35.8 | 58 | 18.9 | 95 | 0.71 | 134 | 0 |
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| 2003 | 23.6 | 116 | 32.3 | 105 | 14.9 | 120 | 0.19 | 153 | 0 |
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| 2002 | 32.1 | 33 | 40.2 | 21 | 24.1 | 41 | 0.96 | 118 | 0 |
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| 2001 | 26.1 | 96 | 34 | 84 | 18.2 | 104 | 2.57 | 31 | 0 |
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| 2000 | 34.1 | 17 | 42.2 | 12 | 25.9 | 25 | 1.97 | 59 | 0 |
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| 1999 | 34 | 18 | 42.1 | 14 | 25.9 | 25 | 1.64 | 75 | 0 |
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| 1998 | 38.7 | 3 | 45 | 6 | 32.4 | 1 | 1.70 | 72 | 0 |
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| 1997 | 29 | 53 | 35.1 | 70 | 22.8 | 53 | 5.56 | 1 | 0 |
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| 1996 | 26 | 99 | 33.9 | 87 | 18.2 | 104 | 0.71 | 134 | 0 |
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| 1995 | 26.4 | 89 | 33.9 | 87 | 19 | 94 | 0.41 | 147 | 0 |
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| 1994 | 22 | 124 | 30.7 | 115 | 13.4 | 129 | 2.56 | 32 | 0 |
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| 1993 | 24.3 | 113 | 31.8 | 108 | 16.9 | 112 | 0.82 | 127 | 0 |
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| 1992 | 33.3 | 23 | 39.6 | 27 | 27 | 18 | 1.39 | 97 | 0 |
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| 1991 | 31 | 37 | 39 | 32 | 23 | 50 | 0.62 | 139 | 0 |
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| 1990 | 31.3 | 36 | 39.6 | 27 | 23 | 50 | 2.25 | 45 | 0 |
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| 1989 | 19.6 | 140 | 27.2 | 138 | 12 | 138 | 0.77 | 128 | 0 |
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| 1988 | 22.7 | 120 | 31.6 | 110 | 13.7 | 128 | 1.29 | 102 | 0 |
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| 1987 | 33.8 | 21 | 42.5 | 10 | 25.2 | 32 | 0.99 | 116 | 0 |
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| 1986 | 23.9 | 114 | 30.5 | 117 | 17.4 | 109 | 2.58 | 30 | 0 |
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| 1985 | 20.3 | 133 | 28.2 | 131 | 12.5 | 136 | 3.46 | 14 | 0 |
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| 1984 | 33.9 | 19 | 41.5 | 17 | 26.2 | 22 | 1.39 | 97 | 0 |
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| 1983 | 30.4 | 41 | 37.5 | 40 | 23.4 | 47 | 2.06 | 54 | 0 |
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| 1982 | 21.5 | 128 | 29.8 | 122 | 13.2 | 132 | 0.41 | 147 | 0 |
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| 1981 | 28 | 66 | 36.6 | 47 | 19.4 | 85 | 2.35 | 41 | 0 |
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| 1980 | 21.5 | 128 | 29 | 127 | 14 | 127 | 1.24 | 105 | 0 |
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| 1979 | 16.7 | 151 | 23.8 | 150 | 9.5 | 147 | 1.11 | 110 | 0 |
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| 1978 | 16.8 | 150 | 24.7 | 145 | 8.9 | 149 | 0.90 | 121 | 0 |
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| 1977 | 26.9 | 82 | 34.4 | 77 | 19.5 | 83 | 0.72 | 133 | 0 |
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| 1976 | 35.7 | 9 | 45.1 | 5 | 26.4 | 20 | 2.18 | 49 | 0 |
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| 1975 | 26.9 | 82 | 33 | 99 | 20.8 | 66 | 2.29 | 42 | 0 |
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| 1974 | 27 | 80 | 34.7 | 75 | 19.3 | 87 | 2.07 | 53 | 0 |
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| 1973 | 30.2 | 45 | 36.3 | 51 | 24.1 | 41 | 1.27 | 103 | 0 |
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| 1972 | 25.5 | 105 | 33.6 | 90 | 17.4 | 109 | 0.92 | 120 | 0 |
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| 1971 | 28.2 | 63 | 35.5 | 63 | 20.9 | 64 | 2.39 | 38 | 0 |
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| 1970 | 26.6 | 86 | 34.4 | 77 | 18.8 | 96 | 1.05 | 112 | 0 |
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| 1969 | 30.3 | 43 | 35.8 | 58 | 24.7 | 36 | 0.25 | 152 | 0 |
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| 1968 | 25.1 | 107 | 33.3 | 94 | 16.8 | 113 | 1.10 | 111 | 0 |
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| 1967 | 22 | 124 | 29.7 | 123 | 14.3 | 125 | 1.86 | 64 | 0 |
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| 1966 | 27.9 | 67 | 34.8 | 73 | 21 | 62 | 1.78 | 68 | 0 |
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| 1965 | 27.4 | 74 | 36 | 57 | 18.7 | 99 | 1.76 | 70 | 0 |
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| 1964 | 28.8 | 55 | 36.6 | 47 | 20.9 | 64 | 0.57 | 140 | 0 |
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| 1963 | 19.1 | 141 | 28 | 132 | 10.3 | 143 | 0.54 | 141 | 0 |
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| 1962 | 25.8 | 102 | 32.3 | 105 | 19.3 | 87 | 1.81 | 66 | 0 |
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| 1961 | 34.3 | 16 | 41.4 | 18 | 27.2 | 15 | 0.90 | 121 | 0 |
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| 1960 | 25.5 | 105 | 30.7 | 115 | 20.4 | 70 | 3.16 | 18 | 1 |
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| 1959 | 26.1 | 96 | 33.5 | 92 | 18.7 | 99 | 2.39 | 38 | 0 |
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| 1958 | 20 | 137 | 26.7 | 142 | 13.3 | 130 | 0.33 | 151 | 0 |
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| 1957 | 33.3 | 23 | 39.4 | 29 | 27.3 | 14 | 1.77 | 69 | 0 |
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| 1956 | 29.3 | 51 | 35.8 | 58 | 22.9 | 52 | 2.26 | 44 | 0 |
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| 1955 | 28.8 | 55 | 36.1 | 54 | 21.4 | 58 | 1.83 | 65 | 0 |
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| 1954 | 37.5 | 5 | 45.5 | 4 | 29.6 | 8 | 2.40 | 37 | 0 |
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| 1953 | 31.7 | 35 | 39.9 | 24 | 23.5 | 45 | 1.58 | 84 | 0 |
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| 1952 | 32.2 | 31 | 38.7 | 35 | 25.8 | 27 | 0.44 | 146 | 0 |
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| 1951 | 27.2 | 77 | 34.8 | 73 | 19.7 | 78 | 2.62 | 27 | 0 |
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| 1950 | 26.2 | 93 | 33.2 | 97 | 19.3 | 87 | 3.35 | 16 | 0 |
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| 1949 | 27.8 | 68 | 35.5 | 63 | 20.1 | 74 | 2.42 | 35 | 0 |
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| 1948 | 26.3 | 92 | 34.3 | 80 | 18.3 | 103 | 1.62 | 78 | 0 |
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| 1947 | 20.5 | 132 | 27.6 | 135 | 13.3 | 130 | 0.38 | 149 | 0 |
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| 1946 | 28.6 | 60 | 36.5 | 50 | 20.6 | 68 | 0.98 | 117 | 0 |
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| 1945 | 28.8 | 55 | 35.4 | 65 | 22.1 | 55 | 1.18 | 109 | 0 |
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| 1944 | 29 | 53 | 36.6 | 47 | 21.3 | 60 | 1.70 | 72 | 0 |
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| 1943 | 27.8 | 68 | 37.2 | 43 | 18.4 | 101 | 1.34 | 99 | 0 |
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| 1942 | 26.5 | 88 | 30.5 | 117 | 22.6 | 54 | 3.03 | 19 | 0 |
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| 1941 | 25.6 | 104 | 31.8 | 108 | 19.4 | 85 | 1.01 | 114 | 0 |
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| 1940 | 29.3 | 51 | 34.1 | 82 | 24.4 | 38 | 0.89 | 123 | 0 |
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| 1939 | 27.6 | 71 | 35.6 | 62 | 19.6 | 79 | 1.98 | 58 | 0 |
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| 1938 | 34.6 | 14 | 40.2 | 21 | 29 | 10 | 2.11 | 52 | 0 |
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| 1937 | 26.4 | 89 | 34.1 | 82 | 18.8 | 96 | 0.63 | 138 | 0 |
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| 1936 | 15.3 | 152 | 23.5 | 152 | 7 | 152 | 1.33 | 100 | 0 |
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| 1935 | 29.7 | 48 | 34.7 | 75 | 24.6 | 37 | 1.59 | 83 | 0 |
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| 1934 | 22.9 | 118 | 30 | 121 | 15.8 | 117 | 0.52 | 143 | 0 |
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| 1933 | 26.2 | 93 | 34 | 84 | 18.4 | 101 | 1.22 | 107 | 0 |
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| 1932 | 34.9 | 11 | 42.7 | 9 | 27.2 | 15 | 1.21 | 108 | 0 |
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| 1931 | 35.6 | 10 | 40.9 | 20 | 30.2 | 6 | 0.76 | 130 | 0 |
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| 1930 | 37.1 | 7 | 43.8 | 7 | 30.4 | 5 | 1.42 | 96 | 0 |
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| 1929 | 21.6 | 127 | 28.4 | 128 | 14.8 | 121 | 0.54 | 141 | 0 |
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| 1928 | 30.3 | 43 | 36.7 | 46 | 23.9 | 44 | 1.57 | 85 | 0 |
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| 1927 | 34.9 | 11 | 41.1 | 19 | 28.8 | 11 | 0.75 | 131 | 0 |
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| 1926 | 30.9 | 38 | 35.4 | 65 | 26.4 | 20 | 2.92 | 22 | 0 |
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| 1925 | 32.2 | 31 | 39.4 | 29 | 24.9 | 33 | 1.62 | 78 | 0 |
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| 1924 | 28.8 | 55 | 33.3 | 94 | 24.4 | 38 | 1.68 | 74 | 0 |
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| 1923 | 22.3 | 123 | 29.1 | 125 | 15.5 | 119 | 1.05 | 112 | 0 |
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| 1922 | 29.4 | 49 | 37.4 | 41 | 21.4 | 58 | 0.74 | 132 | 0 |
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| 1921 | 33.5 | 22 | 38.7 | 35 | 28.2 | 13 | 0.38 | 149 | 0 |
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| 1920 | 25.7 | 103 | 31.6 | 110 | 19.9 | 76 | 0.13 | 155 | 0 |
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| 1919 | 30.5 | 39 | 36.1 | 54 | 24.9 | 33 | 2.78 | 26 | 0 |
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| 1918 | 27.2 | 77 | 35.3 | 68 | 19.2 | 92 | 2.81 | 24 | 0 |
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| 1917 | 19.8 | 139 | 28.3 | 129 | 11.3 | 140 | 0.67 | 136 | 0 |
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| 1916 | 25 | 109 | 31.2 | 113 | 18.8 | 96 | 0.87 | 125 | 0 |
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| 1915 | 34.5 | 15 | 39.8 | 25 | 29.3 | 9 | 1.92 | 63 | 0 |
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| 1914 | 20.3 | 133 | 27.3 | 137 | 13.2 | 132 | 0.93 | 119 | 0 |
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| 1913 | 24.8 | 111 | 32.6 | 101 | 17.1 | 111 | 1.97 | 59 | 0 |
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| 1912 | 21.7 | 126 | 27.7 | 134 | 15.8 | 117 | 1.57 | 85 | 0 |
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| 1911 | 32.4 | 27 | 38.3 | 38 | 26.5 | 19 | 2.27 | 43 | 0 |
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| 1910 | 24.8 | 111 | 31.4 | 112 | 18.2 | 104 | 0.89 | 123 | 0 |
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| 1909 | 32.4 | 27 | 39.2 | 31 | 25.6 | 28 | 3.84 | 7 | 0 |
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| 1908 | 26.7 | 84 | 32.4 | 104 | 21 | 62 | 3.72 | 9 | 0 |
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| 1907 | 26.4 | 89 | 33.4 | 93 | 19.3 | 87 | 1.00 | 115 | 0 |
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| 1906 | 27.5 | 73 | 34.4 | 77 | 20.7 | 67 | 2.37 | 40 | 0 |
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| 1905 | 17 | 146 | 23.8 | 150 | 10.1 | 145 | 1.95 | 61 | 0 |
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| 1904 | 17 | 146 | 24.5 | 146 | 9.5 | 147 | 1.71 | 71 | 0 |
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| 1903 | 24.9 | 110 | 30.4 | 119 | 19.3 | 87 | 3.03 | 19 | 0 |
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| 1902 | 20.7 | 131 | 27 | 139 | 14.4 | 124 | 1.53 | 88 | 0 |
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| 1901 | 17 | 146 | 23.2 | 154 | 10.9 | 142 | 2.05 | 55 | 0 |
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| 1900 | 20.1 | 136 | 28 | 132 | 12.1 | 137 | 3.52 | 11 | 0 |
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| 1899 | 17.9 | 142 | 25.5 | 144 | 10.3 | 143 | 1.60 | 81 | 0 |
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| 1898 | 27.6 | 71 | 33.7 | 89 | 21.5 | 56 | 2.59 | 28 | 0 |
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| 1897 | 28.4 | 62 | 33.3 | 94 | 23.4 | 47 | 2.22 | 47 | 0 |
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| 1896 | 26.6 | 86 | 32.5 | 102 | 20.6 | 68 | 3.48 | 13 | 0 |
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| 1895 | 17 | 146 | 24.1 | 149 | 9.9 | 146 | 1.60 | 81 | 0 |
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| 1894 | 22.9 | 118 | 29.1 | 125 | 16.7 | 115 | 2.13 | 50 | 0 |
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| 1893 | 21.4 | 130 | 28.3 | 129 | 14.6 | 123 | 2.44 | 34 | 0 |
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| 1892 | 30.2 | 45 | 35 | 72 | 25.3 | 31 | 1.57 | 85 | 0 |
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| 1891 | 28.6 | 60 | 35.7 | 61 | 21.5 | 56 | 1.95 | 61 | 0 |
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| 1890 | 32.4 | 27 | 38.7 | 35 | 26.2 | 22 | 2.42 | 35 | 0 |
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| 1889 | 19.9 | 138 | 26.8 | 140 | 13 | 134 | 1.31 | 101 | 0 |
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| 1888 | 22.5 | 122 | 30.9 | 114 | 14.1 | 126 | 1.51 | 90 | 0 |
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| 1887 | 26 | 99 | 35.1 | 70 | 16.8 | 113 | 5.10 | 2 | 0 |
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| 1886 | 29.4 | 49 | 39 | 32 | 19.9 | 76 | 1.51 | 90 | 0 |
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| 1885 | 17.8 | 144 | 26.8 | 140 | 8.8 | 151 | 2.01 | 56 | 0 |
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| 1884 | 27.8 | 68 | 35.4 | 65 | 20.2 | 73 | 3.17 | 17 | 0 |
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| 1883 | 22.6 | 121 | 30.4 | 119 | 14.7 | 122 | 4.74 | 3 | 0 |
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| 1882 | 39 | 2 | 46.4 | 3 | 31.6 | 2 | 2.24 | 46 | 0 |
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| 1881 | 25.1 | 107 | 32.5 | 102 | 17.7 | 108 | 4.28 | 5 | 0 |
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| 1880 | 34.8 | 13 | 42.5 | 10 | 27.1 | 17 | 2.91 | 23 | 0 |
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| 1879 | 27 | 80 | 33.6 | 90 | 20.3 | 71 | 1.47 | 93 | 0 |
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| 1878 | 36.5 | 8 | 41.6 | 16 | 31.3 | 3 | 2.12 | 51 | 0 |
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| 1877 | 37.3 | 6 | 43.5 | 8 | 31.1 | 4 | 0.06 | 156 | 0 |
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| 1876 | 31.9 | 34 | 39.8 | 25 | 24 | 43 | 3.90 | 6 | 0 |
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| 1875 | 14.6 | 153 | 24.4 | 147 | 4.9 | 154 | 1.99 | 57 | 0 |
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| 1874 | 30.5 | 39 | 36.1 | 54 | 24.9 | 33 | 1.51 | 90 | 0 |
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| 1873 | 23.7 | 115 | 36.2 | 53 | 11.1 | 141 | 0.47 | 145 | 0 |
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| 1872 | | | | | | | 0.84 | 126 | 29 |
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| 1871 | | | | | | | 1.45 | 94 | 28 |
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