Every June in Middletown-Harrisburg, PA from 1889 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 | 73.8 | 13 | 84 | 14 | 63.7 | 14 | 0.73 | 136 | 0 |
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| 2025 | 73.8 | 13 | 82.6 | 35 | 64.9 | 6 | 5.24 | 22 | 0 |
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| 2024 | 76 | 2 | 86.7 | 3 | 65.4 | 4 | 4.23 | 41 | 0 |
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| 2023 | 70.3 | 95 | 80.3 | 89 | 60.2 | 99 | 4.37 | 36 | 0 |
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| 2022 | 72.5 | 38 | 82.2 | 47 | 62.7 | 39 | 4.31 | 37 | 0 |
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| 2021 | 75.5 | 3 | 85.2 | 7 | 65.7 | 3 | 2.11 | 113 | 0 |
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| 2020 | 73.4 | 21 | 83.8 | 17 | 63 | 31 | 3.81 | 56 | 0 |
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| 2019 | 72.5 | 38 | 81.8 | 58 | 63.2 | 23 | 5.15 | 25 | 0 |
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| 2018 | 72 | 54 | 81.4 | 65 | 62.6 | 41 | 4.00 | 49 | 0 |
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| 2017 | 73.3 | 25 | 83.5 | 22 | 63.1 | 29 | 3.56 | 65 | 0 |
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| 2016 | 73.5 | 16 | 83 | 29 | 64 | 13 | 4.46 | 35 | 0 |
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| 2015 | 72.9 | 28 | 81.2 | 72 | 64.6 | 9 | 6.84 | 8 | 0 |
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| 2014 | 72.9 | 28 | 82.3 | 43 | 63.5 | 19 | 3.78 | 57 | 0 |
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| 2013 | 72.2 | 46 | 81.4 | 65 | 62.9 | 34 | 3.77 | 58 | 0 |
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| 2012 | 71.2 | 73 | 81.3 | 70 | 61.1 | 79 | 4.29 | 39 | 0 |
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| 2011 | 72.8 | 31 | 82.1 | 50 | 63.4 | 22 | 5.17 | 23 | 0 |
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| 2010 | 74.8 | 6 | 83.7 | 19 | 65.9 | 2 | 4.13 | 45 | 0 |
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| 2009 | 70.2 | 98 | 78.5 | 115 | 61.8 | 60 | 6.14 | 13 | 0 |
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| 2008 | 74.5 | 8 | 84.4 | 10 | 64.5 | 10 | 2.54 | 98 | 0 |
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| 2007 | 73.5 | 16 | 83.4 | 23 | 63.6 | 16 | 3.70 | 60 | 0 |
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| 2006 | 71.7 | 60 | 81 | 79 | 62.4 | 48 | 8.62 | 2 | 0 |
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| 2005 | 74.9 | 5 | 85.2 | 7 | 64.7 | 7 | 1.39 | 127 | 0 |
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| 2004 | 70 | 100 | 78.9 | 109 | 61 | 84 | 4.31 | 37 | 0 |
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| 2003 | 68.2 | 125 | 76.3 | 128 | 60.1 | 101 | 7.31 | 5 | 0 |
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| 2002 | 72.1 | 49 | 81.9 | 55 | 62.3 | 50 | 2.38 | 106 | 0 |
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| 2001 | 72.6 | 34 | 82.3 | 43 | 62.8 | 36 | 2.01 | 114 | 0 |
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| 2000 | 72.1 | 49 | 81.5 | 62 | 62.8 | 36 | 4.09 | 46 | 0 |
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| 1999 | 73.2 | 26 | 83.9 | 15 | 62.5 | 45 | 1.87 | 119 | 0 |
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| 1998 | 70.7 | 82 | 79.5 | 102 | 62 | 55 | 5.82 | 15 | 0 |
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| 1997 | 71.4 | 68 | 82.1 | 50 | 60.7 | 87 | 2.41 | 105 | 0 |
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| 1996 | 73.1 | 27 | 83.1 | 28 | 63.2 | 23 | 6.33 | 12 | 0 |
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| 1995 | 71.6 | 64 | 80.6 | 87 | 62.6 | 41 | 4.16 | 44 | 0 |
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| 1994 | 76.2 | 1 | 87.1 | 2 | 65.2 | 5 | 1.81 | 121 | 0 |
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| 1993 | 72.1 | 49 | 83 | 29 | 61.2 | 75 | 3.20 | 79 | 0 |
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| 1992 | 69.3 | 110 | 79.1 | 107 | 59.5 | 114 | 1.90 | 117 | 0 |
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| 1991 | 74.2 | 10 | 86.2 | 4 | 62.1 | 53 | 1.08 | 131 | 0 |
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| 1990 | 71.2 | 73 | 82.2 | 47 | 60.1 | 101 | 1.10 | 129 | 0 |
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| 1989 | 70.6 | 87 | 79.3 | 106 | 61.8 | 60 | 6.02 | 14 | 0 |
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| 1988 | 70.7 | 82 | 82.9 | 33 | 58.6 | 122 | 1.00 | 134 | 0 |
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| 1987 | 72.6 | 34 | 83 | 29 | 62.1 | 53 | 3.46 | 69 | 0 |
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| 1986 | 71.3 | 70 | 81.2 | 72 | 61.5 | 68 | 1.48 | 126 | 0 |
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| 1985 | 69.4 | 109 | 77.6 | 121 | 61.1 | 79 | 3.07 | 84 | 0 |
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| 1984 | 72.9 | 28 | 82.6 | 35 | 63.2 | 23 | 6.36 | 11 | 0 |
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| 1983 | 69.1 | 111 | 79.8 | 96 | 58.3 | 127 | 2.81 | 92 | 0 |
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| 1982 | 65.1 | 136 | 73.8 | 136 | 56.4 | 137 | 8.12 | 4 | 0 |
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| 1981 | 71.7 | 60 | 81.5 | 62 | 61.8 | 60 | 4.66 | 33 | 0 |
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| 1980 | 67.8 | 126 | 79.7 | 98 | 55.8 | 138 | 2.50 | 100 | 0 |
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| 1979 | 68.5 | 121 | 78.9 | 109 | 58.1 | 129 | 2.62 | 96 | 0 |
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| 1978 | 69.5 | 108 | 80.6 | 87 | 58.4 | 125 | 5.16 | 24 | 0 |
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| 1977 | 68.6 | 120 | 78.8 | 112 | 58.4 | 125 | 3.17 | 80 | 0 |
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| 1976 | 73.4 | 21 | 82.5 | 38 | 64.3 | 11 | 2.42 | 104 | 0 |
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| 1975 | 70.7 | 82 | 79.4 | 105 | 62 | 55 | 6.51 | 9 | 0 |
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| 1974 | 70.5 | 89 | 79.1 | 107 | 61.9 | 59 | 3.69 | 61 | 0 |
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| 1973 | 73.4 | 21 | 83.6 | 21 | 63.2 | 23 | 3.34 | 73 | 0 |
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| 1972 | 67.7 | 127 | 75.4 | 132 | 60 | 108 | 18.55 | 1 | 0 |
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| 1971 | 72.5 | 38 | 82.3 | 43 | 62.7 | 39 | 1.80 | 122 | 0 |
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| 1970 | 70.7 | 82 | 80.7 | 85 | 60.7 | 87 | 5.80 | 16 | 0 |
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| 1969 | 72.4 | 43 | 82.3 | 43 | 62.5 | 45 | 2.54 | 98 | 0 |
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| 1968 | 70.3 | 95 | 81.4 | 65 | 59.1 | 119 | 2.25 | 110 | 0 |
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| 1967 | 73.8 | 13 | 85.7 | 6 | 62 | 55 | 1.90 | 117 | 0 |
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| 1966 | 74.6 | 7 | 87.7 | 1 | 61.4 | 71 | 0.07 | 138 | 0 |
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| 1965 | 71.7 | 60 | 83.2 | 26 | 60.1 | 101 | 2.60 | 97 | 0 |
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| 1964 | 71.4 | 68 | 82.4 | 41 | 60.4 | 93 | 4.20 | 42 | 0 |
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| 1963 | 72.3 | 44 | 83.8 | 17 | 60.7 | 87 | 2.36 | 107 | 0 |
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| 1962 | 72 | 54 | 82.5 | 38 | 61.6 | 66 | 4.03 | 48 | 0 |
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| 1961 | 69.8 | 103 | 81.2 | 72 | 58.5 | 124 | 1.93 | 116 | 0 |
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| 1960 | 70.5 | 89 | 80.9 | 83 | 60.1 | 101 | 4.17 | 43 | 0 |
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| 1959 | 72.1 | 49 | 82.7 | 34 | 61.6 | 66 | 4.81 | 30 | 1 |
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| 1958 | 66.6 | 132 | 76.4 | 127 | 56.8 | 134 | 3.08 | 83 | 0 |
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| 1957 | 74.2 | 10 | 84.2 | 11 | 63.7 | 14 | 3.38 | 72 | 1 |
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| 1956 | 71.2 | 73 | 81.9 | 55 | 60.4 | 93 | 2.66 | 95 | 1 |
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| 1955 | 68.7 | 119 | 78.4 | 117 | 58.9 | 120 | 4.09 | 46 | 0 |
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| 1954 | 71.6 | 64 | 82.4 | 41 | 60.8 | 85 | 0.58 | 137 | 0 |
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| 1953 | 72 | 54 | 82.5 | 38 | 61.4 | 71 | 3.04 | 85 | 0 |
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| 1952 | 73.5 | 16 | 84.2 | 11 | 62.8 | 36 | 0.86 | 135 | 0 |
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| 1951 | 70 | 100 | 79.7 | 98 | 60.4 | 93 | 4.79 | 31 | 0 |
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| 1950 | 69.7 | 107 | 80.1 | 91 | 59.3 | 116 | 1.68 | 124 | 0 |
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| 1949 | 73.4 | 21 | 83.9 | 15 | 63 | 31 | 1.09 | 130 | 0 |
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| 1948 | 70.4 | 92 | 81 | 79 | 59.9 | 109 | 3.26 | 77 | 0 |
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| 1947 | 69.1 | 111 | 79.5 | 102 | 58.6 | 122 | 3.67 | 63 | 0 |
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| 1946 | 68.8 | 117 | 79.6 | 101 | 57.9 | 131 | 5.61 | 19 | 0 |
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| 1945 | 71.3 | 70 | 82.2 | 47 | 60.5 | 91 | 3.95 | 52 | 0 |
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| 1944 | 72 | 54 | 82.6 | 35 | 61.4 | 71 | 5.49 | 20 | 0 |
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| 1943 | | | | | 66.4 | 1 | 2.32 | 108 | 5 |
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| 1942 | 71.1 | 78 | 80.7 | 85 | 61.7 | 64 | 3.63 | 64 | 2 |
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| 1941 | 71.6 | 64 | 82 | 54 | 61.2 | 75 | 3.47 | 68 | 0 |
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| 1940 | 70.5 | 89 | 81.2 | 72 | 59.8 | 110 | 2.93 | 87 | 0 |
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| 1939 | 72.5 | 38 | 83.3 | 24 | 61.7 | 64 | 2.44 | 103 | 0 |
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| 1938 | 70.3 | 95 | 80 | 93 | 60.5 | 91 | 2.92 | 89 | 0 |
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| 1937 | 72.1 | 49 | 81.3 | 70 | 63 | 31 | 7.14 | 7 | 0 |
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| 1936 | 70.4 | 92 | 80.1 | 91 | 60.8 | 85 | 4.61 | 34 | 0 |
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| 1935 | 70.1 | 99 | 79.8 | 96 | 60.4 | 93 | 3.33 | 74 | 0 |
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| 1934 | 74.4 | 9 | 84.1 | 13 | 64.7 | 7 | 3.52 | 66 | 0 |
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| 1933 | 73.5 | 16 | 83.7 | 19 | 63.2 | 23 | 3.46 | 69 | 0 |
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| 1932 | 70.9 | 81 | 80.3 | 89 | 61.4 | 71 | 3.31 | 75 | 0 |
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| 1931 | 71.1 | 78 | 81 | 79 | 61.1 | 79 | 3.28 | 76 | 0 |
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| 1930 | 72.8 | 31 | 83.2 | 26 | 62.3 | 50 | 5.38 | 21 | 0 |
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| 1929 | 70.6 | 87 | 81.1 | 77 | 60.1 | 101 | 5.74 | 17 | 0 |
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| 1928 | 67.2 | 130 | 75.1 | 133 | 59.3 | 116 | 8.16 | 3 | 0 |
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| 1927 | 66.3 | 134 | 75.8 | 131 | 56.8 | 134 | 3.89 | 54 | 0 |
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| 1926 | 66.8 | 131 | 76 | 130 | 57.7 | 133 | 2.14 | 112 | 0 |
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| 1925 | 75.3 | 4 | 86.2 | 4 | 64.3 | 11 | 5.01 | 26 | 0 |
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| 1924 | 68.5 | 121 | 77.2 | 124 | 59.7 | 111 | 6.47 | 10 | 0 |
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| 1923 | 74 | 12 | 84.5 | 9 | 63.5 | 19 | 2.30 | 109 | 0 |
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| 1922 | 72.2 | 46 | 80.8 | 84 | 63.6 | 16 | 2.91 | 90 | 0 |
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| 1921 | 72.8 | 31 | 83 | 29 | 62.6 | 41 | 1.74 | 123 | 0 |
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| 1920 | 69.8 | 103 | 79.5 | 102 | 60.1 | 101 | 3.68 | 62 | 0 |
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| 1919 | 72.6 | 34 | 82.1 | 50 | 63.1 | 29 | 3.90 | 53 | 0 |
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| 1918 | 69 | 114 | 78.4 | 117 | 59.6 | 112 | 2.49 | 101 | 0 |
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| 1917 | 69.8 | 103 | 78.9 | 109 | 60.7 | 87 | 3.17 | 80 | 0 |
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| 1916 | 66.5 | 133 | 74.9 | 134 | 58 | 130 | 3.98 | 51 | 0 |
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| 1915 | 68.4 | 124 | 77.5 | 122 | 59.2 | 118 | 3.51 | 67 | 0 |
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| 1914 | 71.2 | 73 | 81.2 | 72 | 61.2 | 75 | 3.13 | 82 | 0 |
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| 1913 | 71.5 | 67 | 81.7 | 59 | 61.2 | 75 | 1.07 | 132 | 0 |
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| 1912 | 68.8 | 117 | 78.1 | 119 | 59.6 | 112 | 2.78 | 94 | 0 |
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| 1911 | 70.7 | 82 | 79.9 | 94 | 61.5 | 68 | 2.23 | 111 | 0 |
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| 1910 | 67.7 | 127 | 76.7 | 126 | 58.8 | 121 | 4.91 | 29 | 0 |
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| 1909 | 70.4 | 92 | 78.8 | 112 | 62 | 55 | 4.26 | 40 | 0 |
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| 1908 | 71.8 | 59 | 81.7 | 59 | 61.8 | 60 | 1.05 | 133 | 0 |
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| 1907 | 65.5 | 135 | 74.3 | 135 | 56.8 | 134 | 3.43 | 71 | 0 |
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| 1906 | 71.7 | 60 | 81.1 | 77 | 62.3 | 50 | 5.00 | 27 | 0 |
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| 1905 | 69.8 | 103 | 78.5 | 115 | 61.1 | 79 | 2.79 | 93 | 0 |
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| 1904 | 69.1 | 111 | 77.8 | 120 | 60.4 | 93 | 3.99 | 50 | 0 |
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| 1903 | 65.1 | 136 | 72.4 | 137 | 57.8 | 132 | 5.63 | 18 | 0 |
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| 1902 | 69 | 114 | 78.6 | 114 | 59.4 | 115 | 4.76 | 32 | 0 |
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| 1901 | 71.2 | 73 | 81 | 79 | 61.5 | 68 | 1.13 | 128 | 0 |
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| 1900 | 72.2 | 46 | 81.4 | 65 | 62.9 | 34 | 2.88 | 91 | 0 |
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| 1899 | 72.6 | 34 | 81.7 | 59 | 63.5 | 19 | 2.93 | 87 | 0 |
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| 1898 | 72 | 54 | 81.5 | 62 | 62.5 | 45 | 1.98 | 115 | 0 |
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| 1897 | 67.3 | 129 | 76.2 | 129 | 58.3 | 127 | 1.83 | 120 | 0 |
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| 1896 | 68.9 | 116 | 77.5 | 122 | 60.4 | 93 | 3.82 | 55 | 0 |
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| 1895 | 73.5 | 16 | 83.3 | 24 | 63.6 | 16 | 1.66 | 125 | 0 |
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| 1894 | 71.3 | 70 | 81.4 | 65 | 61.1 | 79 | 3.25 | 78 | 0 |
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| 1893 | 71.1 | 78 | 79.7 | 98 | 62.4 | 48 | 2.46 | 102 | 0 |
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| 1892 | 72.5 | 38 | 81.9 | 55 | 63.2 | 23 | 4.93 | 28 | 0 |
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| 1891 | 70 | 100 | 79.9 | 94 | 60.1 | 101 | 3.76 | 59 | 0 |
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| 1890 | 72.3 | 44 | 82.1 | 50 | 62.6 | 41 | 2.97 | 86 | 0 |
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| 1889 | 68.5 | 121 | 76.8 | 125 | 60.2 | 99 | 7.18 | 6 | 0 |
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