Every October in Klamath Falls, OR from 1898 to 2025, 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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| 2025 | 45.3 | 111 | 60.3 | 96 | 30.4 | 109 | 0.70 | 67 | 0 |
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| 2024 | 49.4 | 53 | 67.3 | 23 | 31.4 | 100 | 0.59 | 73 | 0 |
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| 2023 | 48.3 | 70 | 65 | 38 | 31.6 | 98 | 0.20 | 105 | 0 |
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| 2022 | 50.8 | 28 | 71.6 | 4 | 30 | 112 | 0.06 | 110 | 0 |
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| 2021 | 46.2 | 97 | 60.8 | 93 | 31.6 | 98 | 2.31 | 8 | 0 |
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| 2020 | 49.5 | 51 | 70.1 | 7 | 28.8 | 118 | 0.06 | 110 | 0 |
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| 2019 | 42.6 | 122 | 59.6 | 101 | 25.6 | 121 | 0.39 | 90 | 0 |
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| 2018 | 46.6 | 95 | 64 | 53 | 29.3 | 117 | 0.41 | 86 | 0 |
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| 2017 | 46 | 103 | 63.3 | 64 | 28.6 | 119 | 0.47 | 84 | 0 |
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| 2016 | 46 | 103 | 57.6 | 114 | 34.4 | 60 | 2.48 | 7 | 0 |
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| 2015 | 52.4 | 16 | 69.3 | 13 | 35.5 | 47 | 1.01 | 50 | 0 |
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| 2014 | 50.5 | 33 | 65.4 | 34 | 35.7 | 41 | 2.21 | 10 | 0 |
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| 2013 | 44 | 120 | 62.3 | 78 | 25.6 | 121 | 0.01 | 116 | 0 |
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| 2012 | 48.2 | 72 | 64.4 | 47 | 32 | 94 | 0.56 | 75 | 0 |
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| 2011 | 46.7 | 94 | 62.1 | 81 | 31.3 | 102 | 0.54 | 76 | 0 |
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| 2010 | 49.5 | 51 | 63.8 | 56 | 35.2 | 51 | 1.24 | 39 | 0 |
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| 2009 | 45.3 | 111 | 59.3 | 104 | 31.4 | 100 | 0.32 | 94 | 0 |
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| 2008 | 47.6 | 83 | 63.6 | 59 | 31.7 | 97 | 0.42 | 85 | 0 |
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| 2007 | 44.3 | 117 | 57.5 | 115 | 31.2 | 103 | 1.70 | 21 | 0 |
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| 2006 | 46.1 | 100 | 62.3 | 78 | 30 | 112 | 0.89 | 55 | 0 |
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| 2005 | 46 | 103 | 61.8 | 85 | 30.3 | 111 | 0.40 | 88 | 0 |
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| 2004 | 46.1 | 100 | 59.6 | 101 | 32.5 | 90 | 2.16 | 11 | 0 |
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| 2003 | 50.4 | 37 | 66.9 | 25 | 33.8 | 67 | 0.02 | 115 | 0 |
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| 2002 | 45.4 | 109 | 63.4 | 63 | 27.5 | 120 | 0.05 | 113 | 0 |
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| 2001 | 47.7 | 81 | 65.9 | 30 | 29.5 | 115 | 0.32 | 94 | 0 |
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| 2000 | 45.5 | 108 | 59.9 | 99 | 31.2 | 103 | 0.95 | 52 | 0 |
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| 1999 | | | | | | | 0.49 | 83 | 13 |
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| 1998 | | | | | | | 0.00 | 120 | 30 |
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| 1997 | 48.5 | 63 | 63.1 | 66 | 33.8 | 67 | 1.33 | 33 | 0 |
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| 1996 | 50.4 | 37 | 64.6 | 44 | 36.1 | 32 | 1.14 | 43 | 0 |
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| 1995 | 50.4 | 37 | 67.4 | 22 | 33.4 | 81 | 0.01 | 116 | 1 |
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| 1994 | 47.8 | 78 | 64.4 | 47 | 31.2 | 103 | 0.16 | 106 | 1 |
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| 1993 | 51.7 | 20 | 66.7 | 27 | 37.3 | 23 | 0.66 | 70 | 2 |
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| 1992 | 53.4 | 10 | 70 | 8 | 37.3 | 23 | 1.59 | 26 | 3 |
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| 1991 | 54.3 | 7 | 69.6 | 11 | 38.5 | 12 | 0.52 | 79 | 1 |
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| 1990 | 49.4 | 53 | 64.9 | 40 | 34.2 | 62 | 0.32 | 94 | 2 |
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| 1989 | 47.8 | 78 | 62.1 | 81 | 33.5 | 77 | 1.10 | 44 | 1 |
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| 1988 | 55.8 | 3 | 73.8 | 2 | 38 | 18 | 0.00 | 120 | 1 |
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| 1987 | 55.4 | 4 | 71.5 | 5 | 39.2 | 7 | 0.06 | 110 | 0 |
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| 1986 | 50.1 | 41 | 65.2 | 37 | 35.1 | 53 | 0.50 | 81 | 0 |
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| 1985 | 47 | 91 | 61 | 90 | 32.9 | 89 | 0.87 | 57 | 0 |
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| 1984 | 44.2 | 119 | 54.7 | 122 | 33.6 | 74 | 1.94 | 16 | 0 |
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| 1983 | 50.6 | 30 | 65.7 | 32 | 35.5 | 47 | 0.78 | 63 | 0 |
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| 1982 | 47.7 | 81 | 60.5 | 95 | 35 | 54 | 1.34 | 32 | 1 |
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| 1981 | 46.2 | 97 | 58.6 | 108 | 33.7 | 71 | 1.26 | 37 | 0 |
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| 1980 | 50.1 | 41 | 64.6 | 44 | 35.6 | 44 | 0.50 | 81 | 0 |
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| 1979 | 52.6 | 14 | 64.4 | 47 | 40.8 | 2 | 2.94 | 4 | 0 |
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| 1978 | 53.1 | 12 | 69.7 | 10 | 36.4 | 28 | 0.00 | 120 | 0 |
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| 1977 | 49.7 | 46 | 63.5 | 61 | 35.8 | 38 | 0.41 | 86 | 0 |
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| 1976 | 50.6 | 30 | 67.3 | 23 | 33.9 | 66 | 0.14 | 108 | 0 |
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| 1975 | 47.2 | 89 | 59.8 | 100 | 34.6 | 58 | 1.70 | 21 | 0 |
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| 1974 | 50.5 | 33 | 67.9 | 21 | 33 | 87 | 0.53 | 77 | 0 |
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| 1973 | 48.7 | 62 | 63.6 | 59 | 33.8 | 67 | 1.82 | 18 | 1 |
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| 1972 | 49.7 | 46 | 63.5 | 61 | 35.8 | 38 | 1.52 | 27 | 0 |
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| 1971 | 45.9 | 107 | 60.6 | 94 | 31.2 | 103 | 0.75 | 64 | 0 |
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| 1970 | 47.5 | 84 | 62.5 | 74 | 32.5 | 90 | 1.66 | 23 | 0 |
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| 1969 | 44.7 | 116 | 58.4 | 109 | 31.2 | 103 | 2.06 | 13 | 1 |
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| 1968 | 49.3 | 55 | 63.7 | 57 | 34.8 | 56 | 0.84 | 59 | 0 |
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| 1967 | 48.5 | 63 | 64.7 | 42 | 32.2 | 92 | 0.83 | 61 | 0 |
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| 1966 | 49.7 | 46 | 65.9 | 30 | 33.4 | 81 | 0.24 | 102 | 0 |
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| 1965 | 51.9 | 18 | 70.5 | 6 | 33.3 | 85 | 0.05 | 113 | 0 |
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| 1964 | 52.1 | 17 | 68.6 | 15 | 35.6 | 44 | 0.23 | 104 | 0 |
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| 1963 | 49.2 | 57 | 62.6 | 73 | 35.8 | 38 | 1.25 | 38 | 0 |
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| 1962 | 48.2 | 72 | 61.9 | 83 | 34.4 | 60 | 4.55 | 1 | 0 |
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| 1961 | 48.4 | 66 | 63.1 | 66 | 33.6 | 74 | 1.76 | 20 | 0 |
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| 1960 | 49.1 | 58 | 64.4 | 47 | 33.7 | 71 | 0.59 | 73 | 0 |
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| 1959 | 49.8 | 45 | 66.1 | 29 | 33.6 | 74 | 0.53 | 77 | 0 |
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| 1958 | 51.2 | 23 | 68.9 | 14 | 33.5 | 77 | 0.33 | 93 | 0 |
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| 1957 | 45.1 | 113 | 55.5 | 119 | 34.8 | 56 | 1.92 | 17 | 0 |
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| 1956 | 47.2 | 89 | 58.3 | 111 | 36.1 | 32 | 3.27 | 3 | 0 |
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| 1955 | 51.7 | 20 | 64.7 | 42 | 38.7 | 11 | 0.83 | 61 | 0 |
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| 1954 | 48.4 | 66 | 60.9 | 92 | 35.9 | 36 | 0.29 | 98 | 0 |
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| 1953 | 49.3 | 55 | 62.4 | 76 | 36.1 | 32 | 1.44 | 29 | 0 |
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| 1952 | 55.3 | 5 | 68.6 | 15 | 42 | 1 | 0.14 | 108 | 0 |
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| 1951 | 47.8 | 78 | 58.7 | 107 | 36.9 | 25 | 2.09 | 12 | 0 |
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| 1950 | 50.5 | 33 | 62.5 | 74 | 38.5 | 12 | 4.47 | 2 | 0 |
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| 1949 | 46.2 | 97 | 59.5 | 103 | 33 | 87 | 0.36 | 91 | 0 |
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| 1948 | 50.2 | 40 | 62.9 | 70 | 37.5 | 22 | 0.98 | 51 | 0 |
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| 1947 | 50.5 | 33 | 63.3 | 64 | 37.7 | 20 | 1.65 | 24 | 0 |
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| 1946 | 44.3 | 117 | 56.9 | 116 | 31.9 | 95 | 0.91 | 53 | 1 |
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| 1945 | 53.1 | 12 | 66.9 | 25 | 39.3 | 6 | 1.02 | 48 | 0 |
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| 1944 | 54.2 | 8 | 68.2 | 20 | 40.1 | 4 | 0.73 | 65 | 0 |
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| 1943 | 48.5 | 63 | 61 | 90 | 36.1 | 32 | 1.31 | 34 | 0 |
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| 1942 | 52.5 | 15 | 68.3 | 19 | 36.8 | 26 | 0.29 | 98 | 0 |
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| 1941 | 48.4 | 66 | 61.5 | 87 | 35.3 | 50 | 0.88 | 56 | 0 |
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| 1940 | 50.9 | 26 | 63 | 69 | 38.9 | 8 | 1.30 | 35 | 0 |
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| 1939 | 50 | 43 | 62.3 | 78 | 37.7 | 20 | 1.10 | 44 | 0 |
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| 1938 | 48 | 75 | 57.8 | 112 | 38.2 | 15 | 0.62 | 72 | 0 |
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| 1937 | 51.3 | 22 | 63.7 | 57 | 38.9 | 8 | 1.40 | 31 | 0 |
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| 1936 | 54.4 | 6 | 70 | 8 | 38.8 | 10 | 0.01 | 116 | 0 |
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| 1935 | 46.1 | 100 | 56.9 | 116 | 35.2 | 51 | 1.18 | 41 | 0 |
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| 1934 | 51 | 24 | 63.9 | 55 | 38 | 18 | 1.08 | 47 | 0 |
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| 1933 | 53.9 | 9 | 69.6 | 11 | 38.2 | 15 | 2.02 | 14 | 0 |
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| 1932 | 50.6 | 30 | 65.4 | 34 | 35.9 | 36 | 0.24 | 102 | 0 |
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| 1931 | 49.7 | 46 | 62.7 | 71 | 36.7 | 27 | 1.46 | 28 | 0 |
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| 1930 | 47.4 | 86 | 61.3 | 89 | 33.5 | 77 | 0.28 | 100 | 0 |
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| 1929 | 51 | 24 | 66.6 | 28 | 35.5 | 47 | 1.09 | 46 | 0 |
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| 1928 | 48 | 75 | 62.7 | 71 | 33.4 | 81 | 1.23 | 40 | 0 |
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| 1927 | 47.9 | 77 | 64.1 | 51 | 31.8 | 96 | 0.71 | 66 | 0 |
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| 1926 | 49.9 | 44 | 64 | 53 | 35.7 | 41 | 0.65 | 71 | 0 |
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| 1925 | 47.3 | 88 | 61.5 | 87 | 33.1 | 86 | 0.84 | 59 | 0 |
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| 1924 | 46.9 | 92 | 58.9 | 105 | 34.9 | 55 | 2.71 | 5 | 0 |
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| 1923 | 46.8 | 93 | 57.8 | 112 | 35.7 | 41 | 1.43 | 30 | 0 |
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| 1922 | 49.1 | 58 | 61.9 | 83 | 36.3 | 29 | 2.28 | 9 | 0 |
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| 1921 | 53.3 | 11 | 68.5 | 17 | 38.1 | 17 | 0.36 | 91 | 0 |
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| 1920 | 44.8 | 114 | 56.1 | 118 | 33.5 | 77 | 1.02 | 48 | 0 |
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| 1919 | 44.8 | 114 | 60.2 | 98 | 29.5 | 115 | 0.28 | 100 | 0 |
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| 1918 | 50.8 | 28 | 65.4 | 34 | 36.2 | 30 | 1.82 | 18 | 0 |
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| 1917 | 55.9 | 2 | 73.5 | 3 | 38.3 | 14 | 0.00 | 120 | 0 |
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| 1916 | 48.4 | 66 | 64.5 | 46 | 32.2 | 92 | trace | 119 | 0 |
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| 1915 | 50.9 | 26 | 68.4 | 18 | 33.4 | 81 | 0.16 | 106 | 0 |
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| 1914 | 48.9 | 60 | 61.6 | 86 | 36.2 | 30 | 2.02 | 14 | 0 |
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| 1913 | 48.3 | 70 | 62.4 | 76 | 34.1 | 63 | 0.32 | 94 | 0 |
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| 1912 | 43 | 121 | 55.3 | 120 | 30.6 | 108 | 0.51 | 80 | 0 |
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| 1911 | 47.5 | 84 | 60.3 | 96 | 34.6 | 58 | 1.17 | 42 | 0 |
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| 1910 | 49.6 | 50 | 65 | 38 | 34 | 65 | 1.62 | 25 | 2 |
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| 1909 | 48.9 | 60 | 64.1 | 51 | 33.7 | 71 | 1.29 | 36 | 0 |
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| 1908 | 46 | 103 | 58.4 | 109 | 34.1 | 63 | 2.50 | 6 | 2 |
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| 1907 | 58.4 | 1 | 77.3 | 1 | 39.5 | 5 | 0.67 | 68 | 0 |
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| 1905 | 48.1 | 74 | 65.7 | 32 | 30.4 | 109 | 0.40 | 88 | 1 |
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| 1902 | 47.4 | 86 | 64.9 | 40 | 29.9 | 114 | 0.85 | 58 | 3 |
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| 1901 | 51.9 | 18 | 63.1 | 66 | 40.7 | 3 | 0.90 | 54 | 0 |
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| 1900 | 45.4 | 109 | 55.2 | 121 | 35.6 | 44 | | | 0 |
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| 1898 | 46.3 | 96 | 58.9 | 105 | 33.8 | 67 | 0.67 | 68 | 0 |
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