Every December in Avoca, PA from 1901 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 | 26.8 | 103 | 34.2 | 97 | 19.5 | 109 | 2.20 | 77 | 0 |
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| 2024 | 31 | 64 | 38.4 | 55 | 23.5 | 76 | 3.62 | 26 | 0 |
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| 2023 | 39.5 | 3 | 45.3 | 4 | 33.7 | 2 | 5.84 | 3 | 0 |
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| 2022 | 32.9 | 41 | 40.6 | 32 | 25.2 | 56 | 3.68 | 23 | 0 |
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| 2021 | 39.7 | 2 | 46.4 | 2 | 32.9 | 3 | 1.46 | 105 | 0 |
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| 2020 | 34.3 | 26 | 41.5 | 24 | 27 | 32 | 3.52 | 28 | 0 |
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| 2019 | 33.4 | 37 | 40 | 38 | 26.8 | 36 | 2.47 | 64 | 0 |
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| 2018 | 34.1 | 30 | 41.3 | 25 | 27.7 | 26 | 3.19 | 42 | 1 |
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| 2017 | 28.9 | 88 | 35.2 | 90 | 22.6 | 84 | 1.68 | 99 | 0 |
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| 2016 | 32.6 | 49 | 38.8 | 50 | 26.4 | 41 | 2.06 | 86 | 0 |
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| 2015 | 44.4 | 1 | 50.7 | 1 | 38.1 | 1 | 2.55 | 60 | 0 |
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| 2014 | 35.6 | 18 | 40.5 | 34 | 30.7 | 7 | 2.78 | 50 | 0 |
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| 2013 | 31.3 | 61 | 38.3 | 61 | 24.3 | 68 | 3.34 | 37 | 0 |
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| 2012 | 36.2 | 12 | 42.2 | 20 | 30.3 | 9 | 3.92 | 18 | 0 |
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| 2011 | 36.1 | 13 | 43.8 | 11 | 28.5 | 18 | 3.11 | 44 | 0 |
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| 2010 | 26.3 | 107 | 32.8 | 106 | 19.9 | 107 | 2.45 | 65 | 0 |
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| 2009 | 29.3 | 83 | 35.5 | 88 | 23.1 | 78 | 2.71 | 55 | 0 |
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| 2008 | 31.5 | 59 | 39 | 47 | 24 | 72 | 5.09 | 6 | 0 |
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| 2007 | 30.7 | 67 | 36.4 | 74 | 24.9 | 59 | 4.06 | 15 | 0 |
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| 2006 | 37.9 | 5 | 45.4 | 3 | 30.5 | 8 | 1.39 | 107 | 0 |
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| 2005 | 27 | 100 | 33.2 | 102 | 20.8 | 99 | 2.76 | 52 | 0 |
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| 2004 | 30.6 | 71 | 38.4 | 55 | 22.9 | 81 | 3.39 | 34 | 0 |
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| 2003 | 31.5 | 59 | 38.4 | 55 | 24.7 | 63 | 3.97 | 17 | 0 |
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| 2002 | 29 | 87 | 35.1 | 91 | 22.9 | 81 | 3.47 | 30 | 0 |
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| 2001 | 36.9 | 8 | 44.1 | 9 | 29.7 | 10 | 1.11 | 115 | 0 |
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| 2000 | 23 | 120 | 30.5 | 118 | 15.5 | 120 | 2.77 | 51 | 0 |
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| 1999 | 33 | 40 | 40 | 38 | 26.1 | 43 | 1.24 | 111 | 0 |
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| 1998 | 35.8 | 17 | 43.9 | 10 | 27.8 | 25 | 0.86 | 121 | 0 |
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| 1997 | 31.3 | 61 | 37 | 70 | 25.6 | 47 | 2.25 | 76 | 0 |
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| 1996 | 34.5 | 23 | 40.1 | 37 | 28.9 | 15 | 5.37 | 5 | 0 |
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| 1995 | 25.7 | 109 | 31.5 | 113 | 19.8 | 108 | 1.22 | 113 | 0 |
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| 1994 | 36.6 | 10 | 44.5 | 6 | 28.6 | 17 | 2.29 | 75 | 0 |
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| 1993 | 30 | 75 | 36.9 | 72 | 23.1 | 78 | 3.09 | 45 | 0 |
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| 1992 | 32.8 | 44 | 39.7 | 41 | 25.8 | 44 | 2.91 | 48 | 0 |
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| 1991 | 32.8 | 44 | 40.4 | 36 | 25.3 | 54 | 2.73 | 54 | 0 |
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| 1990 | 36 | 15 | 43.7 | 13 | 28.2 | 22 | 4.30 | 12 | 0 |
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| 1989 | 18.6 | 125 | 25.8 | 125 | 11.4 | 125 | 0.96 | 120 | 0 |
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| 1988 | 29.8 | 77 | 37.5 | 66 | 22 | 89 | 1.08 | 116 | 0 |
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| 1987 | 32.6 | 49 | 38.7 | 51 | 26.6 | 38 | 0.99 | 119 | 0 |
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| 1986 | 32.8 | 44 | 38.5 | 53 | 27.1 | 31 | 2.04 | 88 | 0 |
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| 1985 | 26.6 | 104 | 33.3 | 101 | 20 | 105 | 1.96 | 91 | 0 |
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| 1984 | 37.3 | 7 | 43.8 | 11 | 30.8 | 5 | 2.36 | 70 | 0 |
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| 1983 | 27 | 100 | 32.8 | 106 | 21.3 | 97 | 6.58 | 1 | 0 |
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| 1982 | 36.7 | 9 | 44.4 | 7 | 29 | 14 | 1.52 | 101 | 0 |
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| 1981 | 29.1 | 84 | 34.2 | 97 | 24 | 72 | 2.13 | 83 | 0 |
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| 1980 | 25.7 | 109 | 34.3 | 96 | 17.1 | 116 | 1.24 | 111 | 0 |
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| 1979 | 35.6 | 18 | 42.8 | 16 | 28.4 | 20 | 1.70 | 98 | 0 |
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| 1978 | 29.1 | 84 | 36.1 | 78 | 22.1 | 87 | 3.09 | 45 | 0 |
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| 1977 | 29.6 | 78 | 36 | 80 | 23.2 | 77 | 3.44 | 31 | 0 |
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| 1976 | 22.9 | 121 | 31.2 | 115 | 14.5 | 121 | 1.50 | 102 | 0 |
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| 1975 | 31 | 64 | 37.4 | 67 | 24.7 | 63 | 1.84 | 96 | 0 |
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| 1974 | 34.4 | 24 | 39.7 | 41 | 29.1 | 12 | 3.40 | 33 | 0 |
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| 1973 | 31.3 | 61 | 38.3 | 61 | 24.2 | 69 | 6.07 | 2 | 0 |
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| 1972 | 32.9 | 41 | 38.4 | 55 | 27.4 | 28 | 3.61 | 27 | 0 |
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| 1971 | 34.1 | 30 | 41.2 | 28 | 27 | 32 | 2.08 | 85 | 0 |
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| 1970 | 27.3 | 95 | 32.9 | 104 | 21.7 | 91 | 1.85 | 95 | 0 |
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| 1969 | 25.7 | 109 | 30.9 | 116 | 20.5 | 101 | 3.42 | 32 | 0 |
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| 1968 | 27.2 | 99 | 33.6 | 99 | 20.8 | 99 | 1.95 | 92 | 0 |
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| 1967 | 31.7 | 56 | 38.5 | 53 | 24.9 | 59 | 2.45 | 65 | 0 |
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| 1966 | 30.5 | 72 | 36.4 | 74 | 24.5 | 65 | 2.00 | 90 | 0 |
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| 1965 | 33.5 | 35 | 40 | 38 | 27 | 32 | 1.30 | 109 | 0 |
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| 1964 | 31.6 | 57 | 37.7 | 64 | 25.4 | 53 | 3.67 | 24 | 0 |
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| 1963 | 24.3 | 116 | 29.9 | 123 | 18.6 | 111 | 1.94 | 94 | 0 |
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| 1962 | 24 | 117 | 31.5 | 113 | 16.5 | 118 | 2.20 | 77 | 0 |
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| 1961 | 29.5 | 80 | 36 | 80 | 23.1 | 78 | 2.52 | 61 | 0 |
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| 1960 | 21.9 | 123 | 30.3 | 121 | 13.5 | 124 | 1.01 | 118 | 0 |
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| 1959 | 32.1 | 53 | 38.4 | 55 | 25.7 | 45 | 2.71 | 55 | 0 |
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| 1958 | 22.4 | 122 | 30.4 | 120 | 14.3 | 122 | 0.35 | 125 | 0 |
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| 1957 | 33.5 | 35 | 40.7 | 31 | 26.4 | 41 | 4.04 | 16 | 0 |
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| 1956 | 34.2 | 28 | 41.9 | 22 | 26.5 | 40 | 3.24 | 41 | 0 |
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| 1955 | 23.5 | 119 | 30.5 | 118 | 16.5 | 118 | 0.37 | 124 | 0 |
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| 1954 | 30.7 | 67 | 36.5 | 73 | 24.8 | 62 | 2.62 | 57 | 0 |
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| 1953 | 36.4 | 11 | 43.7 | 13 | 29.1 | 12 | 3.85 | 21 | 0 |
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| 1952 | 34.2 | 28 | 39.7 | 41 | 28.7 | 16 | 3.19 | 42 | 0 |
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| 1951 | 32.4 | 51 | 39.3 | 46 | 25.6 | 47 | 2.48 | 63 | 0 |
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| 1950 | 28.5 | 93 | 35.1 | 91 | 21.8 | 90 | 3.90 | 19 | 0 |
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| 1949 | 32.7 | 48 | 40.5 | 34 | 25.7 | 45 | 3.86 | 20 | 2 |
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| 1948 | 32.8 | 44 | 39.7 | 41 | 25.3 | 54 | 4.72 | 8 | 2 |
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| 1947 | 29.4 | 82 | 36.1 | 78 | 22.8 | 83 | 2.44 | 67 | 0 |
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| 1946 | 33.2 | 38 | 41.2 | 28 | 25.2 | 56 | 1.46 | 105 | 0 |
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| 1945 | 26.4 | 106 | 32.3 | 109 | 20.5 | 101 | 1.26 | 110 | 0 |
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| 1944 | 27.3 | 95 | 33.1 | 103 | 21.4 | 95 | 2.33 | 72 | 0 |
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| 1943 | 27.3 | 95 | 35.6 | 85 | 18.9 | 110 | 0.79 | 122 | 0 |
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| 1942 | 26.6 | 104 | 32.9 | 104 | 20.3 | 104 | 4.73 | 7 | 0 |
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| 1941 | 34.3 | 26 | 41.3 | 25 | 27.4 | 28 | 1.47 | 103 | 0 |
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| 1940 | 33.7 | 33 | 40.6 | 32 | 26.8 | 36 | 2.11 | 84 | 0 |
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| 1939 | 31.6 | 57 | 37.7 | 64 | 25.5 | 51 | 2.58 | 59 | 0 |
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| 1938 | 32 | 55 | 38.4 | 55 | 25.5 | 51 | 3.51 | 29 | 0 |
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| 1937 | 30.1 | 74 | 35.8 | 84 | 24.5 | 65 | 1.95 | 92 | 0 |
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| 1936 | 34.4 | 24 | 42.2 | 20 | 26.6 | 38 | 2.75 | 53 | 0 |
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| 1935 | 25.3 | 112 | 30.2 | 122 | 20.4 | 103 | 1.65 | 100 | 0 |
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| 1934 | 29.1 | 84 | 35.6 | 85 | 22.6 | 84 | 2.32 | 73 | 0 |
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| 1933 | 28.9 | 88 | 36.2 | 77 | 21.5 | 93 | 2.15 | 81 | 0 |
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| 1932 | 33.2 | 38 | 41.3 | 25 | 25.2 | 56 | 1.12 | 114 | 0 |
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| 1931 | 36 | 15 | 43.5 | 15 | 28.5 | 18 | 1.35 | 108 | 0 |
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| 1930 | 29.9 | 76 | 35.6 | 85 | 24.2 | 69 | 2.04 | 88 | 0 |
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| 1929 | 32.1 | 53 | 38.6 | 52 | 25.6 | 47 | 3.25 | 40 | 0 |
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| 1928 | 35.2 | 21 | 42.3 | 19 | 28.1 | 23 | 0.49 | 123 | 0 |
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| 1927 | 32.3 | 52 | 38.9 | 49 | 25.6 | 47 | 3.64 | 25 | 0 |
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| 1926 | 25 | 113 | 31.7 | 112 | 18.2 | 112 | 2.06 | 86 | 0 |
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| 1925 | 30.9 | 66 | 37 | 70 | 24.9 | 59 | 1.47 | 103 | 0 |
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| 1924 | 28.9 | 88 | 35.5 | 88 | 22.2 | 86 | 1.06 | 117 | 0 |
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| 1923 | 38.7 | 4 | 44.9 | 5 | 32.5 | 4 | 2.42 | 68 | 0 |
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| 1922 | 30.7 | 67 | 37.9 | 63 | 23.6 | 75 | 2.31 | 74 | 0 |
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| 1921 | 29.6 | 78 | 37.1 | 69 | 22.1 | 87 | 1.83 | 97 | 0 |
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| 1920 | 33.7 | 33 | 39.4 | 45 | 27.9 | 24 | 3.03 | 47 | 0 |
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| 1919 | 24.8 | 115 | 31.9 | 111 | 17.7 | 114 | 2.52 | 61 | 0 |
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| 1918 | 36.1 | 13 | 42.6 | 18 | 29.7 | 10 | 2.88 | 49 | 0 |
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| 1917 | 21.3 | 124 | 28.5 | 124 | 14.1 | 123 | 2.15 | 81 | 0 |
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| 1916 | 30.5 | 72 | 36.4 | 74 | 24.5 | 65 | 3.26 | 39 | 0 |
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| 1915 | 29.5 | 80 | 35 | 93 | 23.9 | 74 | 4.66 | 9 | 0 |
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| 1914 | 28 | 94 | 34.7 | 94 | 21.4 | 95 | 4.19 | 13 | 0 |
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| 1913 | 34.7 | 22 | 41.8 | 23 | 27.6 | 27 | 2.16 | 80 | 0 |
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| 1912 | 35.5 | 20 | 42.7 | 17 | 28.3 | 21 | 4.07 | 14 | 0 |
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| 1911 | 37.5 | 6 | 44.3 | 8 | 30.8 | 5 | 2.36 | 70 | 0 |
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| 1910 | 23.8 | 118 | 30.7 | 117 | 16.9 | 117 | 3.35 | 36 | 0 |
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| 1909 | 27 | 100 | 32.5 | 108 | 21.5 | 93 | 3.39 | 34 | 0 |
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| 1908 | 30.7 | 67 | 37.3 | 68 | 24.2 | 69 | 2.17 | 79 | 0 |
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| 1907 | 32.9 | 41 | 39 | 47 | 26.9 | 35 | 4.63 | 10 | 0 |
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| 1906 | 28.8 | 91 | 35.9 | 82 | 21.7 | 91 | 3.28 | 38 | 0 |
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| 1905 | 34.1 | 30 | 41 | 30 | 27.3 | 30 | 2.38 | 69 | 0 |
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| 1904 | 24.9 | 114 | 32 | 110 | 17.7 | 114 | 3.71 | 22 | 0 |
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| 1903 | 25.8 | 108 | 33.5 | 100 | 18.1 | 113 | 2.59 | 58 | 0 |
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| 1902 | 27.3 | 95 | 34.5 | 95 | 20 | 105 | 4.36 | 11 | 0 |
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| 1901 | 28.6 | 92 | 35.9 | 82 | 21.2 | 98 | 5.64 | 4 | 0 |
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