Every April in Quincy, IL from 1901 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 | 59.2 | 6 | 70.4 | 6 | 48 | 5 | 7.30 | 3 | 0 |
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| 2025 | 56.2 | 28 | 66.5 | 34 | 45.9 | 22 | 3.59 | 59 | 0 |
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| 2024 | 56.1 | 29 | 66.7 | 33 | 45.4 | 26 | 6.57 | 12 | 0 |
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| 2023 | 54.7 | 42 | 67.7 | 24 | 41.6 | 83 | 0.92 | 124 | 0 |
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| 2022 | 50.6 | 100 | 61 | 95 | 40.2 | 96 | 3.01 | 77 | 0 |
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| 2021 | 53.3 | 69 | 63.7 | 73 | 42.9 | 68 | 5.42 | 20 | 0 |
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| 2020 | 50.4 | 102 | 61.5 | 93 | 39.3 | 108 | 4.36 | 44 | 0 |
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| 2019 | 54 | 56 | 64.1 | 66 | 43.8 | 53 | 5.20 | 25 | 0 |
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| 2018 | 45.9 | 123 | 57.1 | 120 | 34.8 | 123 | 0.63 | 126 | 0 |
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| 2017 | 57.6 | 17 | 67.8 | 22 | 47.3 | 13 | 6.81 | 9 | 0 |
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| 2016 | 54.5 | 48 | 65.4 | 45 | 43.5 | 60 | 3.34 | 66 | 0 |
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| 2015 | 55.8 | 32 | 67.7 | 24 | 43.9 | 49 | 1.70 | 112 | 0 |
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| 2014 | 53.2 | 70 | 64.3 | 61 | 42.1 | 76 | 3.45 | 62 | 0 |
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| 2013 | 50.8 | 99 | 60.8 | 96 | 40.7 | 93 | 6.60 | 11 | 0 |
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| 2012 | 55.9 | 30 | 66.8 | 32 | 44.9 | 32 | 3.28 | 69 | 0 |
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| 2011 | 54.3 | 51 | 64.4 | 58 | 44.1 | 42 | 4.11 | 48 | 0 |
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| 2010 | 59.9 | 3 | 71.1 | 3 | 48.6 | 4 | 5.05 | 31 | 0 |
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| 2009 | 51.9 | 87 | 61.9 | 90 | 42 | 78 | 5.29 | 22 | 0 |
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| 2008 | 51 | 98 | 60.8 | 96 | 41.3 | 87 | 3.64 | 57 | 0 |
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| 2007 | 49.9 | 106 | 60.8 | 96 | 38.9 | 110 | 3.40 | 65 | 0 |
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| 2006 | 58 | 13 | 69.9 | 11 | 46.2 | 19 | 2.56 | 91 | 0 |
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| 2005 | 55.1 | 37 | 65.9 | 41 | 44.3 | 38 | 2.87 | 82 | 0 |
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| 2004 | 54.8 | 39 | 65.7 | 43 | 43.9 | 49 | 2.25 | 97 | 0 |
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| 2003 | 54.7 | 42 | 64.8 | 54 | 44.5 | 36 | 3.05 | 74 | 0 |
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| 2002 | 54.3 | 51 | 65 | 49 | 43.6 | 57 | 5.65 | 18 | 0 |
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| 2001 | 58.7 | 8 | 70 | 10 | 47.3 | 13 | 3.10 | 73 | 0 |
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| 2000 | 52.3 | 80 | 63.8 | 70 | 40.9 | 90 | 0.99 | 123 | 0 |
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| 1999 | 54.7 | 42 | 63.3 | 76 | 46.1 | 20 | 5.98 | 16 | 0 |
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| 1998 | 51.9 | 87 | 60.2 | 102 | 43.6 | 57 | 4.56 | 39 | 0 |
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| 1997 | 47.5 | 117 | 57.3 | 119 | 37.6 | 118 | 3.45 | 62 | 0 |
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| 1996 | 49.2 | 111 | 60 | 104 | 38.4 | 114 | 2.20 | 100 | 0 |
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| 1995 | 49.9 | 106 | 59.7 | 106 | 40.1 | 97 | 4.45 | 40 | 0 |
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| 1994 | 52.9 | 75 | 63.3 | 76 | 42.6 | 71 | 6.99 | 6 | 0 |
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| 1993 | 50.4 | 102 | 59.2 | 110 | 41.6 | 83 | 4.82 | 36 | 0 |
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| 1992 | 52 | 83 | 62.3 | 88 | 41.7 | 81 | 5.11 | 30 | 0 |
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| 1991 | 56.5 | 24 | 66.1 | 38 | 47 | 15 | 4.57 | 38 | 0 |
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| 1990 | 51.3 | 93 | 61.4 | 94 | 41.2 | 89 | 2.09 | 104 | 0 |
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| 1989 | 53.6 | 65 | 64.7 | 56 | 42.5 | 73 | 2.50 | 93 | 0 |
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| 1988 | 52.5 | 78 | 65 | 49 | 40 | 100 | 1.11 | 122 | 0 |
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| 1987 | 55.5 | 36 | 67.2 | 29 | 43.2 | 63 | 1.88 | 106 | 1 |
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| 1986 | 57 | 20 | 68.9 | 16 | 45.1 | 28 | 3.30 | 68 | 0 |
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| 1985 | 58.3 | 10 | 68.9 | 16 | 47.7 | 8 | 1.58 | 115 | 0 |
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| 1984 | 51.3 | 93 | 58.6 | 113 | 44 | 46 | 3.99 | 51 | 0 |
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| 1983 | 46.2 | 122 | 53.7 | 125 | 38.6 | 113 | 6.84 | 8 | 0 |
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| 1982 | 47.5 | 117 | 56.8 | 122 | 38.1 | 116 | 3.05 | 74 | 0 |
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| 1981 | 58 | 13 | 68.5 | 19 | 47.6 | 9 | 4.41 | 43 | 0 |
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| 1980 | 53 | 72 | 61.8 | 91 | 44.1 | 42 | 1.62 | 114 | 0 |
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| 1979 | 50.5 | 101 | 58.9 | 111 | 42.1 | 76 | 4.43 | 41 | 0 |
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| 1978 | 53.4 | 68 | 62.5 | 86 | 44.2 | 40 | 5.61 | 19 | 0 |
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| 1977 | 58.6 | 9 | 69.3 | 13 | 47.9 | 6 | 1.88 | 106 | 0 |
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| 1976 | 55.7 | 33 | 66.4 | 36 | 45.1 | 28 | 5.00 | 32 | 0 |
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| 1975 | 50.4 | 102 | 60 | 104 | 40.8 | 91 | 4.00 | 49 | 0 |
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| 1974 | 54.9 | 38 | 65.5 | 44 | 44.2 | 40 | 2.57 | 90 | 0 |
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| 1973 | 51.3 | 93 | 59.5 | 107 | 43 | 65 | 6.74 | 10 | 0 |
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| 1972 | 53 | 72 | 63.6 | 74 | 42.3 | 74 | 4.86 | 35 | 0 |
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| 1971 | 53.8 | 62 | 66 | 39 | 41.6 | 83 | 1.20 | 121 | 0 |
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| 1970 | 54.4 | 49 | 64.2 | 65 | 44.6 | 35 | 7.76 | 2 | 0 |
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| 1969 | 54.8 | 39 | 64.3 | 61 | 45.2 | 27 | 5.13 | 29 | 0 |
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| 1968 | 54.1 | 53 | 65 | 49 | 43.2 | 63 | 2.47 | 94 | 0 |
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| 1967 | 53.6 | 65 | 63.1 | 80 | 44.1 | 42 | 4.42 | 42 | 0 |
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| 1966 | 48.9 | 114 | 58.2 | 114 | 39.6 | 107 | 5.21 | 24 | 0 |
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| 1965 | 53.7 | 63 | 63.4 | 75 | 43.9 | 49 | 4.36 | 44 | 0 |
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| 1964 | 54 | 56 | 64.3 | 61 | 43.6 | 57 | 7.17 | 4 | 0 |
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| 1963 | 56.3 | 27 | 67.7 | 24 | 45 | 30 | 2.19 | 101 | 0 |
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| 1962 | 51.4 | 92 | 62.8 | 82 | 40 | 100 | 1.38 | 119 | 0 |
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| 1961 | 46.7 | 120 | 56.1 | 124 | 37.3 | 119 | 2.96 | 79 | 0 |
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| 1960 | 54.7 | 42 | 65 | 49 | 44.4 | 37 | 3.53 | 61 | 0 |
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| 1959 | 52.3 | 80 | 62.8 | 82 | 41.7 | 81 | 2.61 | 88 | 0 |
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| 1958 | 52.6 | 76 | 62.8 | 82 | 42.3 | 74 | 3.25 | 70 | 0 |
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| 1957 | 52.4 | 79 | 60.7 | 99 | 44 | 46 | 7.11 | 5 | 0 |
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| 1956 | 49.2 | 111 | 61.8 | 91 | 36.5 | 121 | 2.21 | 99 | 0 |
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| 1955 | 58.9 | 7 | 70.2 | 8 | 47.6 | 9 | 3.78 | 54 | 0 |
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| 1954 | 56.4 | 25 | 68.7 | 18 | 44.1 | 42 | 4.34 | 46 | 0 |
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| 1953 | 47.5 | 117 | 57.9 | 118 | 37.2 | 120 | 2.11 | 102 | 0 |
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| 1952 | 52.3 | 80 | 63.8 | 70 | 40.8 | 91 | 3.44 | 64 | 0 |
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| 1951 | 47.9 | 116 | 58.1 | 116 | 37.8 | 117 | 1.76 | 111 | 0 |
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| 1950 | 45.5 | 124 | 56.8 | 122 | 34.3 | 124 | 2.85 | 83 | 0 |
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| 1949 | | | | | | | 1.80 | 109 | 10 |
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| 1948 | 59.4 | 5 | 70.1 | 9 | 48.7 | 3 | 2.23 | 98 | 0 |
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| 1947 | 53.1 | 71 | 63.3 | 76 | 43 | 65 | 6.23 | 15 | 0 |
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| 1946 | 57.8 | 16 | 69.1 | 14 | 46.5 | 18 | 3.66 | 56 | 0 |
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| 1945 | 55.6 | 34 | 66.2 | 37 | 45 | 30 | 4.88 | 34 | 0 |
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| 1944 | 49.9 | 106 | 60.3 | 101 | 40.1 | 97 | 7.97 | 1 | 2 |
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| 1943 | 54.4 | 49 | 67.3 | 28 | 41.5 | 86 | 2.70 | 87 | 0 |
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| 1942 | 58.2 | 12 | 70.7 | 5 | 45.6 | 25 | 5.23 | 23 | 0 |
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| 1941 | 58.3 | 10 | 69.1 | 14 | 47.5 | 11 | 3.85 | 53 | 0 |
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| 1940 | 53 | 72 | 64.6 | 57 | 41.3 | 87 | 2.99 | 78 | 0 |
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| 1939 | 51.3 | 93 | 62.6 | 85 | 40 | 100 | 5.31 | 21 | 0 |
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| 1938 | 54.6 | 46 | 65.9 | 41 | 43.7 | 56 | 3.64 | 57 | 1 |
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| 1937 | 54 | 56 | 64 | 67 | 43.9 | 49 | 3.33 | 67 | 0 |
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| 1936 | 52 | 83 | 63.3 | 76 | 40.7 | 93 | 1.25 | 120 | 0 |
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| 1935 | 51.8 | 89 | 60.5 | 100 | 43 | 65 | 4.24 | 47 | 0 |
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| 1934 | 56.4 | 25 | 67.9 | 21 | 44.9 | 32 | 1.69 | 113 | 0 |
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| 1933 | 54.1 | 53 | 64.4 | 58 | 43.8 | 53 | 2.56 | 91 | 0 |
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| 1932 | 57 | 20 | 68.2 | 20 | 45.8 | 23 | 1.53 | 117 | 0 |
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| 1931 | 54.8 | 39 | 65.3 | 47 | 44.3 | 38 | 1.95 | 105 | 0 |
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| 1930 | 59.7 | 4 | 72 | 2 | 47.4 | 12 | 0.79 | 125 | 0 |
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| 1929 | 57.4 | 18 | 66.9 | 31 | 47.9 | 6 | 6.98 | 7 | 0 |
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| 1928 | 51.3 | 93 | 62.2 | 89 | 40.4 | 95 | 3.58 | 60 | 0 |
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| 1927 | 55.6 | 34 | 64.4 | 58 | 46.9 | 17 | 6.28 | 14 | 0 |
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| 1926 | 49 | 113 | 59.3 | 109 | 38.7 | 111 | 3.19 | 71 | 0 |
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| 1925 | 62.4 | 1 | 74.8 | 1 | 50.1 | 1 | 2.73 | 86 | 0 |
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| 1924 | 58 | 13 | 69.9 | 11 | 46.1 | 20 | 1.57 | 116 | 0 |
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| 1923 | 54.1 | 53 | 65.4 | 45 | 42.8 | 69 | 1.87 | 108 | 0 |
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| 1922 | 56.7 | 23 | 67.8 | 22 | 45.7 | 24 | 3.75 | 55 | 1 |
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| 1921 | 57.4 | 18 | 67.7 | 24 | 47 | 15 | 5.20 | 25 | 0 |
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| 1920 | 49.6 | 109 | 59.5 | 107 | 39.7 | 105 | 5.18 | 27 | 0 |
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| 1919 | 55.9 | 30 | 67.2 | 29 | 44.7 | 34 | 2.10 | 103 | 0 |
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| 1918 | 48.5 | 115 | 58.2 | 114 | 38.7 | 111 | 4.00 | 49 | 0 |
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| 1917 | 49.3 | 110 | 58.8 | 112 | 40.1 | 97 | 4.96 | 33 | 1 |
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| 1916 | 52.6 | 76 | 62.4 | 87 | 42.7 | 70 | 1.79 | 110 | 0 |
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| 1915 | 60.3 | 2 | 71 | 4 | 49.7 | 2 | 1.43 | 118 | 0 |
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| 1914 | 53.7 | 63 | 64 | 67 | 43.4 | 61 | 2.93 | 81 | 0 |
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| 1913 | 53.9 | 60 | 64 | 67 | 43.8 | 53 | 3.12 | 72 | 0 |
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| 1912 | 53.9 | 60 | 63.8 | 70 | 44 | 46 | 3.88 | 52 | 1 |
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| 1911 | 50.1 | 105 | 60.2 | 102 | 39.9 | 103 | 4.67 | 37 | 0 |
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| 1910 | 54.6 | 46 | 66.5 | 34 | 42.6 | 71 | 2.85 | 83 | 0 |
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| 1909 | 52 | 83 | 64.3 | 61 | 39.7 | 105 | 5.89 | 17 | 0 |
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| 1908 | 53.5 | 67 | 65.2 | 48 | 41.9 | 79 | 3.03 | 76 | 3 |
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| 1907 | 45.1 | 125 | 57.1 | 120 | 33 | 125 | 2.59 | 89 | 0 |
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| 1906 | 56.9 | 22 | 70.4 | 6 | 43.3 | 62 | 2.95 | 80 | 0 |
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| 1905 | 52 | 83 | 64.8 | 54 | 39.1 | 109 | 2.42 | 95 | 0 |
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| 1904 | 46.5 | 121 | 58 | 117 | 34.9 | 122 | 6.44 | 13 | 0 |
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| 1903 | 54 | 56 | 66 | 39 | 41.9 | 79 | 5.15 | 28 | 0 |
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| 1902 | 51.5 | 90 | 64.9 | 53 | 38.2 | 115 | 2.77 | 85 | 0 |
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| 1901 | 51.5 | 90 | 63.1 | 80 | 39.9 | 103 | 2.42 | 95 | 0 |
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