Every January in Pendleton, OR from 1894 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 | 36 | 43 | 42.7 | 48 | 29.4 | 45 | 0.34 | 128 | 0 |
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| 2025 | 34.2 | 65 | 42 | 57 | 26.5 | 74 | 1.26 | 79 | 0 |
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| 2024 | 30.9 | 95 | 37.4 | 99 | 24.4 | 90 | 2.44 | 16 | 0 |
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| 2023 | 39 | 23 | 46.9 | 21 | 31.1 | 28 | 0.61 | 112 | 0 |
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| 2022 | 34.1 | 66 | 40.9 | 70 | 27.4 | 64 | 1.53 | 63 | 0 |
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| 2021 | 39.8 | 16 | 47.2 | 19 | 32.4 | 20 | 0.91 | 96 | 0 |
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| 2020 | 41.7 | 6 | 49.8 | 5 | 33.6 | 9 | 2.02 | 31 | 0 |
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| 2019 | 36.7 | 38 | 42.4 | 50 | 31 | 29 | 2.07 | 29 | 0 |
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| 2018 | 39.9 | 15 | 46.5 | 22 | 33.3 | 12 | 1.59 | 57 | 0 |
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| 2017 | 22.5 | 116 | 29.1 | 119 | 16 | 119 | 1.65 | 54 | 0 |
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| 2016 | 35.5 | 50 | 41.9 | 59 | 29.2 | 47 | 1.51 | 65 | 0 |
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| 2015 | 36 | 43 | 42.2 | 53 | 29.9 | 40 | 0.72 | 110 | 0 |
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| 2014 | 34.9 | 58 | 41.2 | 66 | 28.6 | 53 | 0.73 | 109 | 0 |
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| 2013 | 31.2 | 91 | 36.6 | 104 | 25.8 | 81 | 0.98 | 91 | 0 |
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| 2012 | 35.8 | 46 | 46.2 | 24 | 25.4 | 85 | 1.54 | 61 | 0 |
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| 2011 | 35.4 | 54 | 42.6 | 49 | 28.2 | 58 | 1.41 | 71 | 0 |
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| 2010 | 39.6 | 17 | 46 | 25 | 33.2 | 13 | 1.74 | 52 | 0 |
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| 2009 | 33.5 | 75 | 39.8 | 77 | 27.2 | 67 | 1.39 | 74 | 0 |
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| 2008 | 31.5 | 88 | 39.6 | 79 | 23.4 | 100 | 1.82 | 45 | 0 |
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| 2007 | 30.7 | 96 | 37 | 101 | 24.4 | 90 | 0.45 | 124 | 0 |
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| 2006 | 42.2 | 5 | 49.7 | 6 | 34.6 | 5 | 2.18 | 25 | 0 |
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| 2005 | 35.5 | 50 | 42.2 | 53 | 28.9 | 50 | 0.48 | 121 | 0 |
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| 2004 | 28.5 | 106 | 33.6 | 110 | 23.3 | 101 | 2.32 | 18 | 0 |
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| 2003 | 40.6 | 11 | 45.3 | 31 | 35.9 | 3 | 2.92 | 7 | 0 |
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| 2002 | 37 | 36 | 43.2 | 46 | 30.7 | 36 | 0.58 | 116 | 0 |
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| 2001 | 32.7 | 78 | 36.8 | 103 | 28.6 | 53 | 0.95 | 95 | 0 |
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| 2000 | 35.5 | 50 | 40.8 | 71 | 30.2 | 39 | 1.99 | 32 | 0 |
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| 1999 | 41 | 8 | 47.6 | 14 | 34.3 | 6 | 0.81 | 106 | 0 |
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| 1998 | 37.9 | 29 | 46.3 | 23 | 29.5 | 43 | 2.61 | 12 | 0 |
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| 1997 | 32.6 | 79 | 39.3 | 83 | 25.9 | 80 | 1.84 | 43 | 0 |
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| 1996 | 34.5 | 62 | 41.9 | 59 | 27 | 68 | 1.88 | 39 | 0 |
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| 1995 | 34.9 | 58 | 41.1 | 68 | 28.6 | 53 | 2.53 | 13 | 0 |
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| 1994 | 41 | 8 | 48.6 | 9 | 33.4 | 11 | 1.57 | 60 | 0 |
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| 1993 | 25 | 114 | 31.7 | 115 | 18.4 | 112 | 1.79 | 49 | 0 |
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| 1992 | 38.6 | 24 | 45 | 34 | 32.3 | 21 | 0.41 | 127 | 0 |
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| 1991 | 31.2 | 91 | 38.3 | 93 | 24.1 | 94 | 0.98 | 91 | 0 |
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| 1990 | 39.6 | 17 | 45.3 | 31 | 33.8 | 7 | 0.77 | 108 | 0 |
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| 1989 | 38.2 | 26 | 45 | 34 | 31.5 | 25 | 1.86 | 41 | 0 |
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| 1988 | 32.3 | 83 | 38.5 | 90 | 26.2 | 78 | 1.86 | 41 | 0 |
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| 1987 | 30.4 | 99 | 37.1 | 100 | 23.7 | 97 | 1.48 | 67 | 0 |
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| 1986 | 35.8 | 46 | 42.2 | 53 | 29.5 | 43 | 1.66 | 53 | 0 |
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| 1985 | 26.2 | 110 | 28.8 | 120 | 23.7 | 97 | 0.44 | 125 | 0 |
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| 1984 | 34.6 | 61 | 41.4 | 63 | 27.7 | 60 | 0.53 | 117 | 0 |
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| 1983 | 40.8 | 10 | 47.8 | 13 | 33.8 | 7 | 0.86 | 99 | 0 |
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| 1982 | 35 | 57 | 42.3 | 52 | 27.7 | 60 | 1.54 | 61 | 0 |
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| 1981 | 36.2 | 41 | 39.8 | 77 | 32.5 | 19 | 0.89 | 98 | 0 |
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| 1980 | 25.6 | 111 | 31.5 | 116 | 19.7 | 110 | 2.48 | 14 | 0 |
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| 1979 | 15.3 | 122 | 20.5 | 127 | 10.1 | 123 | 1.43 | 69 | 0 |
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| 1978 | 32.2 | 86 | 36.6 | 104 | 27.7 | 60 | 2.82 | 10 | 0 |
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| 1977 | 26.3 | 109 | 30.9 | 118 | 21.7 | 107 | 0.48 | 121 | 0 |
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| 1976 | 39.2 | 20 | 45.6 | 27 | 32.7 | 17 | 1.77 | 51 | 0 |
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| 1975 | 37.1 | 35 | 43.4 | 44 | 30.8 | 34 | 3.53 | 4 | 0 |
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| 1974 | 30.4 | 99 | 36.9 | 102 | 23.9 | 96 | 0.79 | 107 | 0 |
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| 1973 | 31.2 | 91 | 38.9 | 87 | 23.6 | 99 | 0.50 | 118 | 0 |
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| 1972 | 33.9 | 70 | 41.3 | 65 | 26.6 | 72 | 0.96 | 94 | 0 |
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| 1971 | 40 | 14 | 47.4 | 17 | 32.6 | 18 | 0.84 | 101 | 0 |
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| 1970 | 32.3 | 83 | 38.3 | 93 | 26.3 | 77 | 3.92 | 2 | 0 |
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| 1969 | 22 | 117 | 28.2 | 121 | 15.7 | 121 | 2.88 | 8 | 0 |
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| 1968 | 37.3 | 34 | 45.5 | 29 | 29 | 48 | 0.59 | 114 | 0 |
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| 1967 | 42.4 | 4 | 48.8 | 7 | 36 | 2 | 1.59 | 57 | 0 |
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| 1966 | 38.3 | 25 | 44.4 | 39 | 32.2 | 22 | 2.19 | 24 | 0 |
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| 1965 | 35.4 | 54 | 39.9 | 76 | 30.8 | 34 | 3.08 | 5 | 0 |
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| 1964 | 40.2 | 12 | 47.4 | 17 | 33.1 | 14 | 1.07 | 86 | 0 |
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| 1963 | 27 | 107 | 34.6 | 109 | 19.4 | 111 | 1.40 | 72 | 0 |
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| 1962 | 32.3 | 83 | 40.1 | 75 | 24.5 | 89 | 0.70 | 111 | 0 |
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| 1961 | 37 | 36 | 43.2 | 46 | 30.9 | 31 | 0.47 | 123 | 0 |
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| 1960 | 25.4 | 112 | 32.6 | 113 | 18.1 | 114 | 1.10 | 84 | 0 |
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| 1959 | 35.9 | 45 | 43.4 | 44 | 28.5 | 56 | 2.45 | 15 | 0 |
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| 1958 | 37.8 | 31 | 44.2 | 41 | 31.5 | 25 | 2.26 | 19 | 0 |
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| 1957 | 19 | 119 | 26.5 | 123 | 11.4 | 122 | 1.81 | 47 | 0 |
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| 1956 | 34 | 67 | 41.2 | 66 | 26.8 | 70 | 2.97 | 6 | 0 |
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| 1955 | 33.8 | 71 | 39.3 | 83 | 28.3 | 57 | 0.83 | 104 | 0 |
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| 1954 | 34.5 | 62 | 41.7 | 62 | 27.3 | 66 | 1.30 | 78 | 0 |
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| 1953 | 45.8 | 1 | 52.4 | 2 | 39.2 | 1 | 2.88 | 8 | 0 |
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| 1952 | 29 | 105 | 35.3 | 108 | 22.7 | 102 | 0.84 | 101 | 0 |
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| 1951 | 33.7 | 72 | 40.5 | 74 | 26.8 | 70 | 1.99 | 32 | 0 |
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| 1950 | 16.5 | 121 | 24.5 | 124 | 8.6 | 126 | 2.16 | 26 | 0 |
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| 1949 | 16.8 | 120 | 23.8 | 125 | 9.7 | 124 | 0.21 | 129 | 0 |
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| 1948 | 33.5 | 75 | 39.6 | 79 | 27.4 | 64 | 1.40 | 72 | 0 |
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| 1947 | 30.5 | 98 | 38.5 | 90 | 22.6 | 104 | 0.82 | 105 | 0 |
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| 1946 | 37.9 | 29 | 45.2 | 33 | 30.9 | 31 | 1.05 | 87 | 1 |
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| 1945 | 36.3 | 40 | 41.1 | 68 | 31.5 | 25 | 1.80 | 48 | 0 |
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| 1944 | 32.6 | 79 | 38.7 | 89 | 26.5 | 74 | 0.43 | 126 | 0 |
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| 1943 | 25.2 | 113 | 32.5 | 114 | 18 | 115 | 1.38 | 75 | 0 |
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| 1942 | 21.7 | 118 | 27.4 | 122 | 16.1 | 118 | 1.22 | 81 | 0 |
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| 1941 | 34 | 67 | 39 | 86 | 29 | 48 | 1.20 | 82 | 0 |
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| 1940 | 31.1 | 94 | 36.2 | 106 | 26 | 79 | 2.04 | 30 | 0 |
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| 1939 | 40.2 | 12 | 47.2 | 19 | 33.1 | 14 | 1.02 | 90 | 0 |
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| 1938 | 35.5 | 50 | 40.6 | 73 | 30.5 | 37 | 1.03 | 88 | 0 |
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| 1937 | 14.1 | 123 | 23.5 | 126 | 4.7 | 128 | 1.61 | 56 | 0 |
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| 1936 | 35.8 | 46 | 42 | 57 | 29.6 | 41 | 2.26 | 19 | 0 |
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| 1935 | 36.1 | 42 | 44.8 | 37 | 26.5 | 74 | 0.90 | 97 | 2 |
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| 1934 | 43.5 | 2 | 53.4 | 1 | 33.5 | 10 | 1.24 | 80 | 1 |
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| 1933 | 38.2 | 26 | 48 | 12 | 28.8 | 51 | 0.84 | 101 | 1 |
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| 1932 | 32 | 87 | 37.9 | 98 | 26.6 | 72 | 0.50 | 118 | 1 |
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| 1931 | 39.1 | 21 | 48.7 | 8 | 29.6 | 41 | 1.03 | 88 | 1 |
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| 1930 | | | | | 7.1 | 127 | 1.96 | 36 | 9 |
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| 1929 | | | | | 17.6 | 117 | 2.39 | 17 | 4 |
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| 1928 | 30.1 | 102 | 36.2 | 106 | 24.1 | 94 | 1.52 | 64 | 1 |
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| 1927 | 30.4 | 99 | 38.1 | 97 | 22.1 | 105 | 1.91 | 38 | 2 |
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| 1926 | | | | | | | 2.10 | 28 | 8 |
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| 1925 | | | 48.5 | 10 | | | | | 4 |
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| 1924 | 29.8 | 103 | 38.2 | 96 | 21 | 108 | 1.63 | 55 | 2 |
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| 1923 | | | 48.2 | 11 | 33.1 | 14 | 2.13 | 27 | 4 |
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| 1922 | 24.5 | 115 | 33.5 | 111 | 15.8 | 120 | 2.21 | 23 | 1 |
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| 1921 | 37.5 | 33 | 45.6 | 27 | 29.4 | 45 | 1.82 | 45 | 0 |
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| 1920 | 31.5 | 88 | 38.5 | 90 | 24.6 | 88 | 1.17 | 83 | 1 |
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| 1919 | 34.9 | 58 | 45.4 | 30 | 24.4 | 90 | 1.99 | 32 | 0 |
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| 1918 | 39.3 | 19 | 47.6 | 14 | 31.8 | 23 | 1.94 | 37 | 2 |
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| 1917 | 32.8 | 77 | 42.2 | 53 | 24.2 | 93 | 0.85 | 100 | 2 |
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| 1916 | | | | | 8.9 | 125 | | | 6 |
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| 1915 | 32.4 | 82 | 39.3 | 83 | 25.5 | 84 | 0.59 | 114 | 0 |
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| 1914 | 43.1 | 3 | 51 | 4 | 35.2 | 4 | 1.51 | 65 | 0 |
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| 1913 | 31.4 | 90 | 41.4 | 63 | 22.1 | 105 | 2.63 | 11 | 1 |
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| 1912 | | | | | | | 4.18 | 1 | 21 |
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| 1911 | 36.6 | 39 | 45.7 | 26 | 27.5 | 63 | 0.49 | 120 | 1 |
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| 1910 | 29.4 | 104 | 38.3 | 93 | 20.5 | 109 | 1.83 | 44 | 0 |
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| 1909 | 26.7 | 108 | 33.4 | 112 | 17.7 | 116 | 2.22 | 22 | 2 |
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| 1908 | 35.2 | 56 | 43.5 | 43 | 26.9 | 69 | 0.60 | 113 | 0 |
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| 1907 | | | 31.5 | 116 | 18.2 | 113 | 1.99 | 32 | 5 |
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| 1906 | 37.6 | 32 | 45 | 34 | 30.3 | 38 | 0.98 | 91 | 0 |
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| 1905 | 34.3 | 64 | 39.4 | 82 | 28.7 | 52 | 1.38 | 75 | 1 |
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| 1903 | 38.1 | 28 | 44.6 | 38 | 31.6 | 24 | 1.08 | 85 | 0 |
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| 1902 | 33.6 | 74 | 40.8 | 71 | 24.7 | 87 | 1.32 | 77 | 2 |
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| 1901 | | | 44.4 | 39 | | | 1.58 | 59 | 24 |
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| 1900 | 41.2 | 7 | 51.5 | 3 | 30.9 | 31 | 1.48 | 67 | 0 |
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| 1899 | 35.8 | 46 | 43.7 | 42 | 27.9 | 59 | 1.78 | 50 | 1 |
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| 1898 | 34 | 67 | 42.4 | 50 | 25.6 | 82 | 1.43 | 69 | 0 |
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| 1897 | 32.6 | 79 | 39.6 | 79 | 25.1 | 86 | 1.88 | 39 | 2 |
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| 1896 | 39.1 | 21 | 47.6 | 14 | 31 | 29 | | | 1 |
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| 1895 | 30.7 | 96 | 38.8 | 88 | 22.7 | 102 | 2.23 | 21 | 0 |
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| 1894 | 33.7 | 72 | 41.9 | 59 | 25.6 | 82 | 3.62 | 3 | 0 |
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