Every April in Carbondale, IL from 1899 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 | 64.4 | 1 | 75.6 | 4 | 53.1 | 1 | 3.24 | 74 | 1 |
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| 2025 | 60.3 | 18 | 70.6 | 33 | 49.9 | 12 | 9.40 | 9 | 1 |
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| 2024 | 60.2 | 19 | 71.4 | 23 | 49.1 | 19 | 4.75 | 37 | 0 |
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| 2023 | 57.3 | 52 | 69.5 | 50 | 45 | 64 | 4.24 | 51 | 0 |
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| 2022 | 55.8 | 72 | 66.6 | 87 | 45 | 64 | 4.32 | 50 | 0 |
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| 2021 | 55.4 | 82 | 67.3 | 81 | 44 | 82 | 2.96 | 81 | 1 |
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| 2020 | 53.3 | 110 | 64.6 | 109 | 42 | 98 | 2.59 | 94 | 0 |
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| 2019 | 57.3 | 52 | 68.4 | 62 | 46.1 | 50 | 6.82 | 18 | 0 |
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| 2018 | 49.8 | 119 | 60.9 | 120 | 38.8 | 117 | 4.07 | 55 | 0 |
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| 2017 | 60.7 | 16 | 71.1 | 27 | 50.2 | 7 | 12.37 | 2 | 0 |
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| 2016 | 57.5 | 50 | 69.6 | 47 | 45.5 | 60 | 4.53 | 43 | 0 |
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| 2015 | 58.2 | 41 | 69.3 | 52 | 47.1 | 34 | 5.67 | 29 | 0 |
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| 2014 | 56.6 | 64 | 67.1 | 83 | 46 | 52 | 7.82 | 12 | 0 |
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| 2013 | 54.6 | 90 | 66.3 | 89 | 42.9 | 90 | 3.93 | 57 | 0 |
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| 2012 | 58.7 | 36 | 70.4 | 36 | 47 | 36 | 2.53 | 98 | 0 |
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| 2011 | 60.1 | 20 | 70.9 | 29 | 49.2 | 16 | 13.50 | 1 | 0 |
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| 2010 | 62.1 | 7 | 74.1 | 7 | 50.1 | 10 | 3.87 | 62 | 0 |
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| 2009 | 56.4 | 67 | 66.9 | 85 | 45.9 | 53 | 7.78 | 13 | 0 |
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| 2008 | 54.8 | 88 | 65.4 | 102 | 44.2 | 78 | 5.37 | 31 | 0 |
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| 2007 | 53.6 | 103 | 65.7 | 95 | 41.4 | 105 | 3.64 | 64 | 0 |
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| 2006 | 61.2 | 12 | 73.5 | 9 | 49 | 21 | 4.11 | 53 | 0 |
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| 2005 | 56.7 | 62 | 68 | 69 | 45.4 | 62 | 2.85 | 88 | 0 |
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| 2004 | 58.6 | 38 | 69.7 | 46 | 47.5 | 32 | 3.26 | 71 | 0 |
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| 2003 | 57.5 | 50 | 68.6 | 61 | 46.3 | 44 | 4.57 | 42 | 0 |
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| 2002 | 58.1 | 43 | 69.6 | 47 | 46.7 | 40 | 4.82 | 36 | 2 |
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| 2001 | 62.3 | 6 | 72.8 | 13 | 51.7 | 2 | 2.14 | 108 | 2 |
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| 2000 | 53.6 | 103 | 66.6 | 87 | 40.5 | 111 | 1.87 | 114 | 0 |
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| 1999 | 59.1 | 34 | 68 | 69 | 50.2 | 7 | 6.22 | 23 | 0 |
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| 1998 | 55 | 84 | 65.5 | 100 | 44.5 | 76 | 7.47 | 16 | 0 |
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| 1997 | 50.2 | 117 | 61.9 | 118 | 38.4 | 118 | 2.93 | 84 | 0 |
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| 1996 | 51.5 | 115 | 62.3 | 117 | 40.7 | 109 | 11.83 | 3 | 0 |
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| 1995 | 55 | 84 | 67.7 | 75 | 42.2 | 96 | 2.95 | 82 | 0 |
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| 1994 | 55.7 | 75 | 67.4 | 80 | 44.1 | 80 | 6.41 | 21 | 0 |
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| 1993 | 50.7 | 116 | 61.7 | 119 | 39.8 | 114 | 5.06 | 34 | 0 |
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| 1992 | 55.8 | 72 | 67.2 | 82 | 44.4 | 77 | 3.04 | 78 | 0 |
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| 1991 | 58.1 | 43 | 69.9 | 41 | 46.2 | 48 | 3.63 | 66 | 0 |
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| 1990 | 53.8 | 101 | 65.2 | 103 | 42.2 | 96 | 6.13 | 24 | 1 |
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| 1989 | 54.9 | 86 | 68.2 | 65 | 41 | 107 | 2.03 | 111 | 2 |
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| 1988 | 54.3 | 96 | 69 | 56 | 39.9 | 113 | 2.55 | 96 | 1 |
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| 1987 | 54.6 | 90 | 68.2 | 65 | 40.6 | 110 | 2.14 | 108 | 2 |
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| 1985 | 58.2 | 41 | 70.4 | 36 | 45.8 | 54 | 2.78 | 89 | 2 |
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| 1984 | 53.3 | 110 | 63.5 | 113 | 43.1 | 89 | 2.57 | 95 | 0 |
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| 1983 | 49 | 120 | 58.4 | 121 | 39.6 | 116 | 11.60 | 4 | 0 |
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| 1982 | 50 | 118 | 63.7 | 112 | 37.3 | 120 | 1.92 | 113 | 2 |
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| 1981 | 62.5 | 3 | 74.8 | 5 | 50.2 | 7 | 1.68 | 117 | 0 |
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| 1980 | 53.9 | 100 | 66.1 | 90 | 41.6 | 103 | 2.21 | 106 | 0 |
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| 1979 | 54 | 98 | 63.4 | 114 | 44.7 | 72 | 8.26 | 10 | 0 |
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| 1978 | 58.1 | 43 | 69.9 | 41 | 46.3 | 44 | 3.26 | 71 | 0 |
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| 1977 | 59.9 | 25 | 73.2 | 10 | 46.5 | 43 | 1.79 | 115 | 0 |
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| 1976 | 57.8 | 47 | 71.3 | 25 | 43.9 | 83 | 2.43 | 100 | 3 |
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| 1975 | 53.8 | 101 | 65.6 | 96 | 41.9 | 101 | 4.60 | 40 | 0 |
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| 1974 | 56.3 | 69 | 68.4 | 62 | 44.2 | 78 | 4.40 | 46 | 0 |
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| 1973 | 54 | 98 | 62.4 | 116 | 45.6 | 59 | 7.52 | 15 | 0 |
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| 1972 | 57.8 | 47 | 69.9 | 41 | 45.7 | 58 | 5.74 | 28 | 0 |
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| 1971 | 56.3 | 69 | 70.1 | 39 | 42.6 | 94 | 3.90 | 58 | 0 |
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| 1970 | 60.1 | 20 | 71.9 | 19 | 48.2 | 26 | 5.13 | 33 | 0 |
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| 1969 | 58.4 | 40 | 69.8 | 44 | 47 | 36 | 3.96 | 56 | 0 |
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| 1968 | 58.5 | 39 | 70.6 | 33 | 46.3 | 44 | 4.50 | 44 | 0 |
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| 1967 | 61.7 | 10 | 72.9 | 12 | 50.5 | 4 | 2.88 | 86 | 0 |
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| 1966 | 55.7 | 75 | 65.6 | 96 | 45.8 | 54 | 7.28 | 17 | 0 |
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| 1965 | 61.9 | 9 | 73.7 | 8 | 50 | 11 | 3.14 | 76 | 0 |
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| 1964 | 61 | 13 | 71.4 | 23 | 50.5 | 4 | 3.89 | 60 | 0 |
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| 1963 | 60.1 | 20 | 72.3 | 16 | 47.9 | 27 | 1.39 | 119 | 0 |
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| 1962 | 54.9 | 86 | 67 | 84 | 42.9 | 90 | 2.27 | 105 | 0 |
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| 1961 | 52.5 | 113 | 63.3 | 115 | 42 | 98 | 4.36 | 48 | 1 |
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| 1960 | 59.6 | 28 | 73.1 | 11 | 46.1 | 50 | 2.78 | 89 | 0 |
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| 1959 | 58.1 | 43 | 70.4 | 36 | 45.8 | 54 | 2.16 | 107 | 0 |
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| 1958 | 56.6 | 64 | 68.3 | 64 | 44.9 | 67 | 5.21 | 32 | 0 |
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| 1957 | 60 | 23 | 70.8 | 30 | 49.2 | 16 | 10.69 | 5 | 0 |
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| 1956 | 54.3 | 96 | 67.5 | 79 | 41 | 107 | 2.64 | 93 | 1 |
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| 1955 | 62.1 | 7 | 74.5 | 6 | 49.8 | 14 | 2.88 | 86 | 0 |
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| 1954 | 62.4 | 4 | 75.8 | 3 | 49.1 | 19 | 2.77 | 91 | 0 |
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| 1953 | 52.3 | 114 | 65.6 | 96 | 39.8 | 114 | 3.88 | 61 | 2 |
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| 1952 | 55.7 | 75 | 68.1 | 68 | 43.3 | 88 | 4.08 | 54 | 0 |
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| 1951 | 53.6 | 103 | 64.9 | 107 | 42.3 | 95 | 3.15 | 75 | 0 |
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| 1950 | 53.4 | 108 | 65 | 106 | 41.9 | 101 | 6.49 | 20 | 0 |
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| 1949 | 55.7 | 75 | 67.8 | 73 | 43.7 | 87 | 1.60 | 118 | 0 |
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| 1948 | 60.7 | 16 | 72.8 | 13 | 48.5 | 24 | 3.25 | 73 | 0 |
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| 1947 | 57.3 | 52 | 67.6 | 77 | 46.9 | 38 | 6.12 | 25 | 0 |
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| 1946 | 60.8 | 14 | 72.3 | 16 | 49.3 | 15 | 3.90 | 58 | 0 |
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| 1945 | 57.8 | 47 | 67.6 | 77 | 47.9 | 27 | 10.14 | 7 | 0 |
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| 1944 | 55.7 | 75 | 65.5 | 100 | 45.8 | 54 | 5.83 | 27 | 0 |
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| 1943 | 55.5 | 81 | 66 | 91 | 44.9 | 67 | 3.60 | 67 | 0 |
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| 1942 | 59.4 | 30 | 70.1 | 39 | 48.7 | 23 | 3.47 | 69 | 0 |
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| 1941 | 61.5 | 11 | 72.1 | 18 | 50.8 | 3 | 2.95 | 82 | 0 |
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| 1940 | 55.8 | 72 | 67.8 | 73 | 43.8 | 84 | 5.86 | 26 | 0 |
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| 1939 | 54.6 | 90 | 65.2 | 103 | 44.1 | 80 | 7.76 | 14 | 0 |
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| 1938 | 59.7 | 26 | 71.5 | 22 | 47.9 | 27 | 2.43 | 100 | 0 |
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| 1937 | 57.1 | 59 | 67.9 | 71 | 46.2 | 48 | 4.66 | 38 | 0 |
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| 1936 | 53.5 | 107 | 65.8 | 94 | 41.2 | 106 | 2.53 | 98 | 0 |
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| 1935 | 54.7 | 89 | 64.6 | 109 | 44.9 | 67 | 4.14 | 52 | 0 |
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| 1934 | 57.2 | 58 | 68.8 | 58 | 45.5 | 60 | 3.09 | 77 | 0 |
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| 1933 | 56.4 | 67 | 66.7 | 86 | 46.3 | 44 | 5.01 | 35 | 1 |
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| 1932 | 58.8 | 35 | 70.6 | 33 | 47.1 | 34 | 3.36 | 70 | 0 |
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| 1931 | 57.3 | 52 | 69.8 | 44 | 44.7 | 72 | 4.36 | 48 | 0 |
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| 1930 | 60.8 | 14 | 72.7 | 15 | 48.9 | 22 | 1.36 | 120 | 0 |
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| 1929 | 60 | 23 | 70.8 | 30 | 49.2 | 16 | 5.56 | 30 | 0 |
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| 1928 | 53.4 | 108 | 64.8 | 108 | 42 | 98 | 4.61 | 39 | 0 |
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| 1927 | 59.7 | 26 | 69.5 | 50 | 49.9 | 12 | 9.63 | 8 | 0 |
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| 1926 | 52.8 | 112 | 65.6 | 96 | 40 | 112 | 2.98 | 80 | 0 |
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| 1925 | 63.9 | 2 | 77.2 | 1 | 50.5 | 4 | 2.93 | 84 | 0 |
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| 1924 | 59.4 | 30 | 71.6 | 21 | 47.3 | 33 | 2.74 | 92 | 0 |
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| 1923 | 56.1 | 71 | 69.2 | 54 | 42.9 | 90 | 3.64 | 64 | 0 |
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| 1922 | 59.3 | 33 | 71.8 | 20 | 46.8 | 39 | 4.42 | 45 | 0 |
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| 1921 | 58.7 | 36 | 70.7 | 32 | 46.6 | 41 | 4.59 | 41 | 0 |
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| 1920 | 54.4 | 94 | 66 | 91 | 42.7 | 93 | 4.37 | 47 | 0 |
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| 1919 | 59.6 | 28 | 71.3 | 25 | 47.8 | 30 | 3.56 | 68 | 0 |
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| 1918 | 54.4 | 94 | 65.1 | 105 | 43.8 | 84 | 6.50 | 19 | 0 |
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| 1917 | 56.9 | 60 | 69 | 56 | 44.7 | 72 | 8.00 | 11 | 0 |
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| 1916 | 55.6 | 80 | 66 | 91 | 45.1 | 63 | 2.39 | 103 | 0 |
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| 1915 | 62.4 | 4 | 76.4 | 2 | 48.4 | 25 | 0.77 | 121 | 0 |
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| 1914 | 57.3 | 52 | 67.9 | 71 | 46.6 | 41 | 2.42 | 102 | 0 |
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| 1913 | 56.5 | 66 | 69.3 | 52 | 43.8 | 84 | 3.00 | 79 | 0 |
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| 1912 | 59.4 | 30 | 71.1 | 27 | 47.8 | 30 | 6.38 | 22 | 0 |
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| 1911 | 56.8 | 61 | 68.7 | 59 | 44.9 | 67 | 10.59 | 6 | 0 |
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| 1910 | 57.3 | 52 | 69.6 | 47 | 45 | 64 | 3.70 | 63 | 0 |
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| 1903 | 56.7 | 62 | 68.7 | 59 | 44.7 | 72 | 1.98 | 112 | 0 |
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| 1902 | | | 67.7 | 75 | | | 2.09 | 110 | 12 |
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| 1901 | 55.2 | 83 | 68.2 | 65 | 41.5 | 104 | 1.79 | 115 | 2 |
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| 1900 | 53.6 | 103 | 69.2 | 54 | 38 | 119 | 2.54 | 97 | 0 |
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| 1899 | 54.6 | 90 | 64.3 | 111 | 44.8 | 71 | 2.32 | 104 | 0 |
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