Every April in Pullman, WA 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 | 47 | 48 | 58.2 | 38 | 35.8 | 69 | 2.42 | 21 | 0 |
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| 2025 | 46.4 | 59 | 58.2 | 38 | 34.5 | 96 | 0.79 | 102 | 0 |
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| 2024 | 45.4 | 75 | 56.2 | 66 | 34.6 | 94 | 1.31 | 70 | 0 |
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| 2023 | 44.6 | 90 | 55 | 78 | 34.3 | 103 | 1.50 | 58 | 0 |
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| 2022 | 41.1 | 122 | 49.9 | 122 | 32.2 | 125 | 2.36 | 26 | 0 |
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| 2021 | 47.8 | 39 | 60.2 | 22 | 35.4 | 78 | 0.40 | 120 | 0 |
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| 2020 | 46.5 | 57 | 58 | 41 | 34.9 | 88 | 0.58 | 109 | 0 |
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| 2019 | 48.1 | 34 | 56.5 | 61 | 39.6 | 15 | 3.65 | 5 | 0 |
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| 2018 | 46.6 | 55 | 56.1 | 69 | 37 | 45 | 2.38 | 22 | 0 |
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| 2017 | 46.2 | 62 | 54.6 | 82 | 37.7 | 37 | 1.92 | 41 | 0 |
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| 2016 | 52.2 | 5 | 63.8 | 6 | 40.7 | 6 | 1.83 | 47 | 0 |
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| 2015 | 45.7 | 71 | 58 | 41 | 33.3 | 113 | 0.58 | 109 | 0 |
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| 2014 | 46.1 | 64 | 56.5 | 61 | 35.7 | 73 | 1.45 | 65 | 0 |
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| 2013 | 44.4 | 94 | 54.6 | 82 | 34.2 | 104 | 2.37 | 24 | 0 |
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| 2012 | 47.7 | 40 | 57.6 | 46 | 37.8 | 32 | 2.61 | 15 | 0 |
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| 2011 | 40.9 | 124 | 49.3 | 124 | 32.4 | 122 | 2.50 | 20 | 0 |
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| 2010 | 45.6 | 72 | 55.6 | 72 | 35.4 | 78 | 2.37 | 24 | 1 |
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| 2009 | 45.1 | 78 | 55.3 | 75 | 34.8 | 91 | 2.10 | 36 | 0 |
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| 2008 | 42.8 | 113 | 52.7 | 105 | 32.9 | 118 | 0.68 | 108 | 0 |
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| 2007 | 45.9 | 68 | 56.5 | 61 | 35.3 | 81 | 1.08 | 85 | 0 |
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| 2006 | 47.6 | 41 | 57 | 53 | 38.2 | 28 | 2.26 | 30 | 0 |
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| 2005 | 46.8 | 52 | 57.6 | 46 | 35.9 | 66 | 0.74 | 106 | 0 |
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| 2004 | 48.1 | 34 | 60.4 | 20 | 35.8 | 69 | 1.28 | 71 | 0 |
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| 2003 | 45.5 | 73 | 54.5 | 84 | 36.6 | 53 | 0.57 | 111 | 1 |
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| 2002 | 44.9 | 85 | 55.2 | 76 | 34.5 | 96 | 1.09 | 82 | 0 |
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| 2001 | 43.9 | 100 | 52.6 | 107 | 35.2 | 85 | 1.45 | 65 | 0 |
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| 2000 | 48.5 | 28 | 59.8 | 29 | 37.2 | 43 | 0.40 | 120 | 0 |
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| 1999 | 43.7 | 106 | 54.7 | 81 | 32.7 | 120 | 0.38 | 122 | 0 |
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| 1998 | 45.5 | 73 | 56.3 | 65 | 35.3 | 81 | 0.85 | 97 | 2 |
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| 1997 | 42.4 | 115 | 51.9 | 112 | 33.2 | 116 | 2.61 | 15 | 2 |
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| 1996 | 46 | 66 | 55.2 | 76 | 37.3 | 41 | 4.66 | 2 | 3 |
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| 1995 | 44.9 | 85 | 55 | 78 | 34.9 | 88 | 1.65 | 51 | 1 |
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| 1994 | 49.3 | 22 | 59.2 | 31 | 39.8 | 14 | 1.50 | 58 | 2 |
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| 1993 | 46.1 | 64 | 54.5 | 84 | 37.9 | 31 | 3.75 | 4 | 1 |
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| 1992 | 49.5 | 19 | 59.6 | 30 | 39.3 | 17 | 2.58 | 17 | 0 |
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| 1991 | 45.9 | 68 | 56.1 | 69 | 35.8 | 69 | 1.35 | 68 | 0 |
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| 1990 | 49.6 | 18 | 60.8 | 14 | 38.6 | 24 | 2.81 | 9 | 2 |
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| 1989 | 48.8 | 26 | 59.2 | 31 | 38.4 | 26 | 0.77 | 104 | 0 |
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| 1988 | 47.9 | 37 | 58.3 | 35 | 37.3 | 41 | 2.00 | 39 | 1 |
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| 1987 | 51.8 | 7 | 64.4 | 5 | 39.2 | 19 | 1.03 | 87 | 0 |
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| 1986 | 45.2 | 76 | 55.6 | 72 | 34.8 | 91 | 1.09 | 82 | 2 |
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| 1985 | 48.7 | 27 | 60 | 25 | 37 | 45 | 0.88 | 95 | 1 |
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| 1984 | 43.9 | 100 | 53.2 | 100 | 34.5 | 96 | 1.46 | 63 | 1 |
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| 1983 | 44.3 | 96 | 56.1 | 69 | 32.5 | 121 | 0.85 | 97 | 0 |
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| 1982 | 41.6 | 119 | 51.1 | 117 | 32.4 | 122 | 2.72 | 13 | 1 |
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| 1981 | 45.1 | 78 | 54.2 | 90 | 36 | 63 | 2.22 | 32 | 0 |
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| 1980 | 49.7 | 15 | 60 | 25 | 39.6 | 15 | 1.21 | 77 | 1 |
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| 1979 | 44.6 | 90 | 53 | 103 | 36.2 | 58 | 2.67 | 14 | 0 |
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| 1978 | 44.4 | 94 | 53.2 | 100 | 35.6 | 75 | 2.74 | 12 | 0 |
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| 1977 | 49.2 | 23 | 62.1 | 8 | 36.2 | 58 | 0.32 | 123 | 0 |
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| 1976 | 43.8 | 103 | 53 | 103 | 34.7 | 93 | 2.12 | 35 | 0 |
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| 1975 | 39.8 | 127 | 48.4 | 128 | 31.1 | 129 | 1.61 | 55 | 0 |
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| 1974 | 44.7 | 89 | 52.5 | 109 | 36.9 | 49 | 1.92 | 41 | 0 |
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| 1973 | 45.1 | 78 | 56.2 | 66 | 34.1 | 107 | 0.19 | 126 | 0 |
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| 1972 | 42.4 | 115 | 50.7 | 119 | 34 | 109 | 1.21 | 77 | 0 |
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| 1971 | 43.7 | 106 | 53.5 | 94 | 34 | 109 | 1.27 | 72 | 0 |
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| 1970 | 40.1 | 126 | 48.8 | 127 | 31.3 | 128 | 1.13 | 81 | 0 |
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| 1969 | 47 | 48 | 57.2 | 51 | 36.7 | 52 | 2.76 | 10 | 0 |
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| 1968 | 43.9 | 100 | 54.4 | 87 | 33.2 | 116 | 0.51 | 113 | 1 |
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| 1967 | 41.1 | 122 | 50.6 | 120 | 31.6 | 126 | 1.74 | 49 | 0 |
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| 1966 | 45.1 | 78 | 56.9 | 55 | 33.3 | 113 | 0.48 | 114 | 0 |
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| 1965 | 47.6 | 41 | 57.4 | 49 | 37.8 | 32 | 2.33 | 29 | 0 |
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| 1964 | 42.1 | 117 | 52.6 | 107 | 31.5 | 127 | 1.62 | 53 | 0 |
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| 1963 | 43.8 | 103 | 53.2 | 100 | 34.4 | 102 | 1.79 | 48 | 0 |
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| 1962 | 48.5 | 28 | 60.2 | 22 | 36.9 | 49 | 1.67 | 50 | 0 |
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| 1961 | 44.3 | 96 | 54.2 | 90 | 34.5 | 96 | 1.63 | 52 | 0 |
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| 1960 | 46.4 | 59 | 56.9 | 55 | 35.8 | 69 | 2.10 | 36 | 0 |
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| 1959 | 46.6 | 55 | 57.4 | 49 | 35.9 | 66 | 0.97 | 92 | 0 |
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| 1958 | 44.5 | 93 | 53.4 | 98 | 35.5 | 77 | 5.04 | 1 | 0 |
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| 1957 | 46.2 | 62 | 56.7 | 59 | 35.6 | 75 | 1.86 | 45 | 0 |
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| 1956 | 49.2 | 23 | 60.9 | 12 | 37.5 | 40 | 0.16 | 127 | 0 |
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| 1955 | 40.7 | 125 | 48.9 | 126 | 32.4 | 122 | 2.16 | 33 | 0 |
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| 1954 | 43.7 | 106 | 53.4 | 98 | 33.9 | 111 | 1.53 | 57 | 0 |
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| 1953 | 44.9 | 85 | 54.3 | 88 | 35.4 | 78 | 1.25 | 73 | 0 |
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| 1952 | 49.4 | 20 | 61.9 | 9 | 37 | 45 | 1.48 | 62 | 0 |
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| 1951 | 46.8 | 52 | 60.6 | 17 | 32.9 | 118 | 0.46 | 115 | 0 |
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| 1950 | | | | | | | 0.75 | 105 | 30 |
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| 1949 | 50.2 | 10 | 60.6 | 17 | 40 | 13 | 0.80 | 101 | 1 |
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| 1948 | 44.2 | 98 | 52.7 | 105 | 36.1 | 61 | 2.55 | 18 | 3 |
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| 1947 | 48.2 | 31 | 57.8 | 45 | 38.5 | 25 | 1.18 | 79 | 1 |
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| 1946 | 48.3 | 30 | 58.3 | 35 | 38.2 | 28 | 0.79 | 102 | 0 |
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| 1945 | 43.4 | 109 | 51.9 | 112 | 35.3 | 81 | 1.24 | 74 | 1 |
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| 1944 | 48.2 | 31 | 58.5 | 34 | 37.8 | 32 | 2.35 | 27 | 0 |
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| 1943 | | | | | 40.3 | 9 | 1.15 | 80 | 5 |
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| 1942 | 49.7 | 15 | 60 | 25 | 39.3 | 17 | 0.96 | 93 | 1 |
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| 1941 | 50.7 | 9 | 60.9 | 12 | 40.3 | 9 | 2.06 | 38 | 2 |
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| 1940 | 48.9 | 25 | 57.5 | 48 | 40.2 | 11 | 2.16 | 33 | 0 |
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| 1939 | 50.1 | 13 | 60.8 | 14 | 38.9 | 20 | 0.52 | 112 | 2 |
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| 1938 | 47.3 | 47 | 56.4 | 64 | 38.2 | 28 | 0.98 | 91 | 0 |
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| 1937 | | | 51.7 | 115 | 36 | 63 | 3.13 | 7 | 4 |
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| 1936 | 50.8 | 8 | 60.5 | 19 | 41.1 | 5 | 0.43 | 117 | 0 |
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| 1935 | 43.8 | 103 | 52.5 | 109 | 35.3 | 81 | 2.38 | 22 | 1 |
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| 1934 | 55.6 | 1 | 67.2 | 1 | 43.9 | 1 | 0.88 | 95 | 0 |
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| 1933 | 46.5 | 57 | 56.9 | 55 | 36.4 | 56 | 0.70 | 107 | 1 |
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| 1932 | 47.6 | 41 | 56.9 | 55 | 38.9 | 20 | 0.85 | 97 | 3 |
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| 1931 | 45.8 | 70 | 55 | 78 | 35.7 | 73 | 1.98 | 40 | 3 |
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| 1930 | 52 | 6 | 62.7 | 7 | 41.3 | 2 | 1.87 | 44 | 0 |
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| 1929 | 42.7 | 114 | 50.9 | 118 | 34.5 | 96 | | | 0 |
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| 1928 | 44.2 | 98 | 52.1 | 111 | 36.2 | 58 | 1.50 | 58 | 0 |
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| 1927 | 43.4 | 109 | 53.5 | 94 | 33.9 | 111 | | | 1 |
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| 1926 | 53.1 | 3 | 64.8 | 4 | 41.3 | 2 | 0.43 | 117 | 0 |
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| 1925 | 50 | 14 | 59.9 | 28 | 40.1 | 12 | 1.04 | 86 | 0 |
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| 1924 | 47 | 48 | 58.1 | 40 | 35.9 | 66 | 0.24 | 125 | 0 |
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| 1923 | 47 | 48 | 56.2 | 66 | 37.8 | 32 | | | 0 |
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| 1922 | 41.6 | 119 | 49.9 | 122 | 33.3 | 113 | 1.43 | 67 | 0 |
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| 1921 | | | | | | | 2.34 | 28 | 5 |
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| 1920 | 42.1 | 117 | 50 | 121 | 34.2 | 104 | 2.76 | 10 | 0 |
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| 1919 | 47.5 | 45 | 57.2 | 51 | 37.7 | 37 | 1.84 | 46 | 0 |
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| 1918 | 46.7 | 54 | 57 | 53 | 36.5 | 55 | 0.46 | 115 | 0 |
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| 1917 | 41.3 | 121 | 48.3 | 129 | 34.2 | 104 | 4.21 | 3 | 1 |
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| 1916 | 46 | 66 | 54.1 | 92 | 37.8 | 32 | 1.02 | 88 | 0 |
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| 1915 | 50.2 | 10 | 60.1 | 24 | 40.4 | 8 | 1.55 | 56 | 0 |
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| 1914 | 47.6 | 41 | 56.7 | 59 | 38.4 | 26 | | | 0 |
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| 1913 | 45.2 | 76 | 54.3 | 88 | 36.1 | 61 | 1.50 | 58 | 0 |
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| 1912 | 45 | 82 | 53.5 | 94 | 36.3 | 57 | | | 1 |
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| 1911 | 44.9 | 85 | 54.5 | 84 | 35.2 | 85 | 0.27 | 124 | 0 |
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| 1910 | 53.3 | 2 | 65 | 3 | 41.2 | 4 | 2.26 | 30 | 1 |
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| 1909 | | | | | 30.9 | 130 | | | 5 |
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| 1908 | 47.4 | 46 | 57.9 | 44 | 37 | 45 | 1.46 | 63 | 1 |
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| 1907 | | | | | | | | | 9 |
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| 1906 | 53.1 | 3 | 65.6 | 2 | 40.6 | 7 | 0.42 | 119 | 0 |
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| 1905 | 49.7 | 15 | 60.7 | 16 | 38.8 | 23 | 1.62 | 53 | 3 |
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| 1904 | 50.2 | 10 | 61.7 | 10 | 38.9 | 20 | 1.34 | 69 | 3 |
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| 1903 | 45 | 82 | 55.5 | 74 | 34.5 | 96 | 1.09 | 82 | 1 |
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| 1902 | 46.3 | 61 | 58 | 41 | 34.9 | 88 | 1.02 | 88 | 3 |
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| 1901 | 44.6 | 90 | 54 | 93 | 35.2 | 85 | 0.90 | 94 | 0 |
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| 1900 | 49.4 | 20 | 61.3 | 11 | 37.2 | 43 | 3.50 | 6 | 1 |
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| 1899 | 43.1 | 111 | 51.6 | 116 | 34.6 | 94 | 2.55 | 18 | 0 |
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| 1898 | 48 | 36 | 58.3 | 35 | 37.7 | 37 | 1.02 | 88 | 0 |
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| 1897 | 47.9 | 37 | 59 | 33 | 36.9 | 49 | 1.22 | 76 | 2 |
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| 1896 | 43 | 112 | 51.8 | 114 | 34.1 | 107 | 1.89 | 43 | 0 |
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| 1895 | 48.2 | 31 | 60.4 | 20 | 36 | 63 | 0.83 | 100 | 0 |
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| 1894 | 45 | 82 | 53.5 | 94 | 36.6 | 53 | 1.23 | 75 | 0 |
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| 1893 | | | 49.2 | 125 | | | 3.13 | 7 | 30 |
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