Every July in Middletown-Harrisburg, PA from 1888 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 | 78.2 | 19 | 86.9 | 38 | 69.5 | 14 | 4.65 | 45 | 0 |
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| 2025 | 79.8 | 8 | 88.2 | 19 | 71.5 | 2 | 6.15 | 21 | 0 |
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| 2024 | 80.2 | 5 | 89.9 | 7 | 70.5 | 4 | 1.99 | 110 | 0 |
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| 2023 | 78.5 | 17 | 87.3 | 35 | 69.7 | 11 | 4.97 | 38 | 0 |
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| 2022 | 78.9 | 12 | 87.7 | 25 | 70.1 | 6 | 3.33 | 74 | 0 |
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| 2021 | 77.6 | 31 | 86.4 | 50 | 68.7 | 23 | 8.00 | 9 | 0 |
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| 2020 | 82.2 | 1 | 92.2 | 3 | 72.2 | 1 | 1.35 | 128 | 0 |
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| 2019 | 80.3 | 4 | 89.8 | 8 | 70.7 | 3 | 3.22 | 77 | 0 |
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| 2018 | 77 | 41 | 86.5 | 44 | 67.5 | 34 | 12.09 | 1 | 0 |
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| 2017 | 77.6 | 31 | 86 | 55 | 69.1 | 19 | 9.53 | 3 | 0 |
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| 2016 | 79.4 | 9 | 88.7 | 14 | 70.1 | 6 | 5.10 | 33 | 0 |
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| 2015 | 76.1 | 53 | 84.6 | 85 | 67.5 | 34 | 2.69 | 97 | 0 |
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| 2014 | 76 | 57 | 85.3 | 69 | 66.6 | 53 | 4.34 | 53 | 0 |
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| 2013 | 77.9 | 26 | 86.1 | 54 | 69.7 | 11 | 5.23 | 29 | 0 |
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| 2012 | 79.3 | 10 | 89.1 | 13 | 69.5 | 14 | 4.60 | 47 | 0 |
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| 2011 | 79.9 | 6 | 90 | 6 | 69.8 | 9 | 3.78 | 61 | 0 |
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| 2010 | 79.3 | 10 | 89.3 | 11 | 69.4 | 16 | 5.80 | 24 | 0 |
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| 2009 | 73 | 129 | 82.4 | 124 | 63.5 | 124 | 3.20 | 78 | 0 |
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| 2008 | 76.9 | 43 | 86.5 | 44 | 67.3 | 39 | 3.53 | 70 | 0 |
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| 2007 | 75 | 83 | 84.9 | 76 | 65 | 95 | 4.22 | 54 | 0 |
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| 2006 | 77.9 | 26 | 86.5 | 44 | 69.3 | 17 | 5.13 | 32 | 0 |
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| 2005 | 77.6 | 31 | 86.5 | 44 | 68.6 | 24 | 6.31 | 19 | 0 |
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| 2004 | 74.3 | 103 | 82.1 | 129 | 66.5 | 54 | 7.97 | 10 | 0 |
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| 2003 | 75 | 83 | 83.9 | 95 | 66.2 | 61 | 5.09 | 34 | 0 |
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| 2002 | 78.2 | 19 | 88.6 | 16 | 67.8 | 31 | 1.27 | 129 | 0 |
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| 2001 | 73.2 | 124 | 83.5 | 99 | 62.9 | 135 | 1.90 | 117 | 0 |
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| 2000 | 73.2 | 124 | 82.3 | 126 | 64.1 | 118 | 2.32 | 103 | 0 |
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| 1999 | 81.8 | 2 | 93.5 | 1 | 70.2 | 5 | 2.96 | 89 | 0 |
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| 1998 | 75.3 | 74 | 84.8 | 79 | 65.7 | 77 | 4.86 | 39 | 0 |
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| 1997 | 77.4 | 35 | 88.7 | 14 | 66.1 | 63 | 4.82 | 41 | 0 |
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| 1996 | 74 | 113 | 82.6 | 118 | 65.5 | 83 | 7.06 | 13 | 0 |
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| 1995 | 77.9 | 26 | 86.9 | 38 | 68.9 | 20 | 5.81 | 23 | 0 |
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| 1994 | 78.6 | 16 | 88 | 21 | 69.3 | 17 | 8.09 | 8 | 0 |
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| 1993 | 78 | 25 | 87.5 | 27 | 68.4 | 25 | 3.65 | 65 | 0 |
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| 1992 | 75 | 83 | 83.5 | 99 | 66.4 | 59 | 3.54 | 69 | 0 |
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| 1991 | 78.7 | 15 | 89.4 | 9 | 67.9 | 30 | 1.99 | 110 | 0 |
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| 1990 | 75.2 | 77 | 85 | 74 | 65.4 | 87 | 3.62 | 67 | 0 |
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| 1989 | 73.7 | 118 | 82.5 | 121 | 64.9 | 98 | 7.20 | 12 | 0 |
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| 1988 | 78.8 | 14 | 90.2 | 5 | 67.4 | 37 | 4.40 | 51 | 0 |
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| 1987 | 78.2 | 19 | 89.3 | 11 | 67.1 | 45 | 1.96 | 114 | 0 |
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| 1986 | 76.3 | 47 | 85.1 | 73 | 67.5 | 34 | 5.17 | 31 | 0 |
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| 1985 | 75.9 | 62 | 84.8 | 79 | 66.9 | 49 | 2.50 | 100 | 0 |
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| 1984 | 74.3 | 103 | 82.8 | 115 | 65.7 | 77 | 3.76 | 62 | 0 |
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| 1983 | 75.8 | 64 | 87.4 | 30 | 64.3 | 114 | 0.97 | 135 | 0 |
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| 1982 | 74.4 | 102 | 84.2 | 90 | 64.5 | 107 | 2.90 | 91 | 0 |
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| 1981 | 75.7 | 65 | 85.6 | 64 | 65.8 | 73 | 4.67 | 44 | 0 |
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| 1980 | 76.3 | 47 | 87.7 | 25 | 64.8 | 103 | 1.59 | 125 | 0 |
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| 1979 | 73.3 | 122 | 82.5 | 121 | 64.2 | 117 | 3.14 | 82 | 0 |
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| 1978 | 73.1 | 127 | 82.7 | 116 | 63.5 | 124 | 4.35 | 52 | 0 |
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| 1977 | 75.9 | 62 | 86 | 55 | 65.7 | 77 | 3.01 | 87 | 0 |
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| 1976 | 72.3 | 134 | 81.5 | 134 | 63.1 | 132 | 5.50 | 27 | 0 |
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| 1975 | 75.2 | 77 | 84.5 | 88 | 66 | 66 | 3.13 | 84 | 0 |
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| 1974 | 77.6 | 31 | 87.4 | 30 | 67.8 | 31 | 2.79 | 95 | 0 |
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| 1973 | 75.5 | 69 | 85.4 | 68 | 65.6 | 82 | 2.18 | 106 | 0 |
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| 1972 | 76.2 | 52 | 85 | 74 | 67.4 | 37 | 2.26 | 104 | 0 |
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| 1971 | 75.5 | 69 | 86.5 | 44 | 64.5 | 107 | 2.84 | 92 | 0 |
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| 1970 | 76.1 | 53 | 85.3 | 69 | 67 | 46 | 6.34 | 17 | 0 |
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| 1969 | 75.2 | 77 | 84.2 | 90 | 66.3 | 60 | 9.72 | 2 | 0 |
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| 1968 | 77.3 | 38 | 87.5 | 27 | 67 | 46 | 1.94 | 115 | 0 |
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| 1967 | 74.2 | 106 | 83.5 | 99 | 64.9 | 98 | 5.96 | 22 | 0 |
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| 1966 | 79.9 | 6 | 93.2 | 2 | 66.5 | 54 | 0.81 | 138 | 0 |
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| 1965 | 75.6 | 67 | 87.3 | 35 | 63.8 | 120 | 3.10 | 86 | 0 |
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| 1964 | 76 | 57 | 86 | 55 | 66.1 | 63 | 2.25 | 105 | 0 |
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| 1963 | 76.3 | 47 | 88.3 | 18 | 64.4 | 110 | 1.97 | 113 | 0 |
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| 1962 | 74.8 | 94 | 86.2 | 52 | 63.5 | 124 | 1.20 | 132 | 0 |
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| 1961 | 75 | 83 | 85.6 | 64 | 64.5 | 107 | 6.60 | 15 | 0 |
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| 1960 | 72.9 | 131 | 83.4 | 104 | 62.4 | 137 | 4.73 | 43 | 0 |
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| 1959 | 76 | 57 | 85.9 | 61 | 66 | 66 | 3.20 | 78 | 0 |
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| 1958 | 76 | 57 | 84.7 | 82 | 67.3 | 39 | 2.76 | 96 | 0 |
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| 1957 | 75 | 83 | 85.6 | 64 | 64.3 | 114 | 1.68 | 123 | 0 |
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| 1956 | 72 | 136 | 80.4 | 137 | 63.6 | 123 | 4.57 | 48 | 0 |
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| 1955 | 80.4 | 3 | 91 | 4 | 69.8 | 9 | 0.78 | 139 | 0 |
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| 1954 | 74.9 | 90 | 86.5 | 44 | 63.3 | 130 | 2.33 | 102 | 0 |
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| 1953 | 75.6 | 67 | 86.7 | 42 | 64.4 | 110 | 3.58 | 68 | 0 |
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| 1952 | 77.7 | 30 | 88.4 | 17 | 67 | 46 | 4.09 | 55 | 0 |
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| 1951 | 75.3 | 74 | 86 | 55 | 64.9 | 98 | 1.16 | 133 | 3 |
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| 1950 | 72.6 | 132 | 82.6 | 118 | 62.6 | 136 | 3.19 | 80 | 0 |
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| 1949 | 78.1 | 22 | 87.4 | 30 | 68.8 | 21 | 8.28 | 7 | 0 |
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| 1948 | 75.3 | 74 | 85.3 | 69 | 65.3 | 89 | 2.02 | 109 | 0 |
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| 1947 | 73.4 | 120 | 83.4 | 104 | 63.4 | 129 | 5.46 | 28 | 0 |
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| 1946 | 74.7 | 96 | 86.2 | 52 | 63.1 | 132 | 3.36 | 72 | 0 |
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| 1945 | 74.2 | 106 | 83.3 | 108 | 65.1 | 93 | 8.52 | 5 | 0 |
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| 1944 | 77.1 | 40 | 89.4 | 9 | 64.8 | 103 | 0.88 | 136 | 0 |
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| 1943 | | | | | 65.7 | 77 | 2.05 | 108 | 5 |
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| 1942 | 76 | 57 | 86 | 55 | 65.9 | 70 | 5.53 | 25 | 0 |
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| 1941 | 76.1 | 53 | 86.7 | 42 | 65.5 | 83 | 2.80 | 93 | 0 |
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| 1940 | 76.5 | 44 | 88.2 | 19 | 64.8 | 103 | 3.17 | 81 | 0 |
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| 1939 | 75.2 | 77 | 86 | 55 | 64.4 | 110 | 1.63 | 124 | 0 |
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| 1938 | 75.7 | 65 | 84.7 | 82 | 66.7 | 50 | 2.65 | 99 | 0 |
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| 1937 | 74.8 | 94 | 84 | 93 | 65.5 | 83 | 4.83 | 40 | 0 |
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| 1936 | 76.3 | 47 | 86.9 | 38 | 65.7 | 77 | 5.02 | 36 | 0 |
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| 1935 | 77.4 | 35 | 86.4 | 50 | 68.3 | 27 | 3.46 | 71 | 0 |
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| 1934 | 78.1 | 22 | 87.8 | 23 | 68.4 | 25 | 2.68 | 98 | 0 |
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| 1933 | 75 | 83 | 84.9 | 76 | 65.2 | 91 | 4.64 | 46 | 0 |
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| 1932 | 74.9 | 90 | 84.6 | 85 | 65.2 | 91 | 2.46 | 101 | 0 |
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| 1931 | 77.9 | 26 | 87 | 37 | 68.8 | 21 | 3.89 | 60 | 0 |
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| 1930 | 77 | 41 | 87.5 | 27 | 66.5 | 54 | 1.24 | 131 | 0 |
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| 1929 | 73.9 | 115 | 83.9 | 95 | 63.9 | 119 | 3.01 | 87 | 0 |
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| 1928 | 75.4 | 73 | 84.8 | 79 | 66 | 66 | 5.20 | 30 | 0 |
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| 1927 | 74.2 | 106 | 83.5 | 99 | 65 | 95 | 3.63 | 66 | 0 |
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| 1926 | 75 | 83 | 84.1 | 92 | 65.8 | 73 | 3.94 | 58 | 0 |
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| 1925 | 73.6 | 119 | 82.3 | 126 | 64.8 | 103 | 7.26 | 11 | 0 |
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| 1924 | 73.3 | 122 | 82.4 | 124 | 64.3 | 114 | 4.52 | 49 | 0 |
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| 1923 | 74.2 | 106 | 83.5 | 99 | 64.9 | 98 | 3.33 | 74 | 0 |
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| 1922 | 74.6 | 98 | 83.4 | 104 | 65.9 | 70 | 3.91 | 59 | 0 |
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| 1921 | 78.9 | 12 | 87.8 | 23 | 70 | 8 | 1.26 | 130 | 0 |
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| 1920 | 73 | 129 | 82.3 | 126 | 63.7 | 121 | 4.02 | 57 | 0 |
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| 1919 | 75.2 | 77 | 84.5 | 88 | 65.9 | 70 | 6.83 | 14 | 0 |
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| 1918 | 73.2 | 124 | 82.9 | 112 | 63.5 | 124 | 3.34 | 73 | 0 |
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| 1917 | 74.7 | 96 | 82.7 | 116 | 66.7 | 50 | 3.12 | 85 | 0 |
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| 1916 | 76.3 | 47 | 84.9 | 76 | 67.8 | 31 | 4.48 | 50 | 0 |
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| 1915 | 74.2 | 106 | 83.2 | 110 | 65.1 | 93 | 4.03 | 56 | 0 |
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| 1914 | 73.8 | 116 | 82.1 | 129 | 65.4 | 87 | 6.21 | 20 | 0 |
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| 1913 | 75.5 | 69 | 85.3 | 69 | 65.8 | 73 | 2.92 | 90 | 0 |
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| 1912 | 74.2 | 106 | 82.9 | 112 | 65.5 | 83 | 2.08 | 107 | 0 |
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| 1911 | 77.3 | 38 | 87.4 | 30 | 67.3 | 39 | 1.81 | 120 | 0 |
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| 1910 | 76.5 | 44 | 85.7 | 63 | 67.3 | 39 | 1.41 | 127 | 0 |
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| 1909 | 73.4 | 120 | 83.4 | 104 | 63.5 | 124 | 0.86 | 137 | 0 |
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| 1908 | 76.4 | 46 | 85.5 | 67 | 67.2 | 44 | 5.51 | 26 | 0 |
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| 1907 | 74.9 | 90 | 83.8 | 97 | 66.1 | 63 | 1.99 | 110 | 0 |
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| 1906 | 74.5 | 101 | 82.9 | 112 | 66 | 66 | 1.74 | 122 | 0 |
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| 1905 | 74.6 | 98 | 82.5 | 121 | 66.7 | 50 | 5.01 | 37 | 0 |
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| 1904 | 73.1 | 127 | 81.9 | 132 | 64.4 | 110 | 4.76 | 42 | 0 |
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| 1903 | 74 | 113 | 83.1 | 111 | 64.9 | 98 | 1.76 | 121 | 0 |
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| 1902 | 74.3 | 103 | 83.3 | 108 | 65.3 | 89 | 3.68 | 63 | 0 |
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| 1901 | 78.5 | 17 | 87.4 | 30 | 69.6 | 13 | 1.52 | 126 | 0 |
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| 1900 | 78.1 | 22 | 88 | 21 | 68.1 | 28 | 3.14 | 82 | 0 |
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| 1899 | 75.1 | 82 | 84 | 93 | 66.2 | 61 | 1.90 | 117 | 0 |
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| 1898 | 77.4 | 35 | 86.8 | 41 | 68.1 | 28 | 5.07 | 35 | 0 |
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| 1897 | 75.5 | 69 | 83.7 | 98 | 67.3 | 39 | 3.68 | 63 | 0 |
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| 1896 | 74.6 | 98 | 82.6 | 118 | 66.5 | 54 | 6.32 | 18 | 0 |
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| 1895 | 71.4 | 137 | 80.7 | 136 | 62.1 | 138 | 1.16 | 133 | 0 |
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| 1894 | 76.1 | 53 | 85.8 | 62 | 66.5 | 54 | 1.89 | 119 | 0 |
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| 1893 | 74.9 | 90 | 84.7 | 82 | 65 | 95 | 1.92 | 116 | 0 |
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| 1892 | 74.2 | 106 | 84.6 | 85 | 63.7 | 121 | 6.48 | 16 | 0 |
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| 1891 | 69.6 | 138 | 78.6 | 138 | 60.6 | 139 | 8.40 | 6 | 0 |
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| 1890 | 72.6 | 132 | 82.1 | 129 | 63.2 | 131 | 2.80 | 93 | 0 |
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| 1889 | 73.8 | 116 | 81.8 | 133 | 65.8 | 73 | 8.68 | 4 | 0 |
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| 1888 | 72.2 | 135 | 81.5 | 134 | 63 | 134 | 3.27 | 76 | 0 |
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