 1870.5   -74.37    22.06
 1871.5   -77.38    22.35
 1872.5   -68.97    21.88
 1873.5   -72.71    22.22
 1874.5   -74.35    22.13
 1875.5   -77.99    22.16
 1876.5   -65.55    22.46
 1877.5   -55.41    21.83
 1878.5   -53.95    23.24
 1879.5   -66.04    23.38
 1880.5   -65.19    22.22
 1881.5   -61.46    21.66
 1882.5   -74.04    19.96
 1883.5   -72.71    19.69
 1884.5   -61.78    19.80
 1885.5   -64.23    18.90
 1886.5   -58.45    18.17
 1887.5   -61.76    18.14
 1888.5   -65.03    18.06
 1889.5   -59.21    18.15
 1890.5   -59.46    18.44
 1891.5   -58.91    18.47
 1892.5   -55.32    19.52
 1893.5   -49.85    18.69
 1894.5   -57.33    19.11
 1895.5   -45.51    18.98
 1896.5   -51.12    18.48
 1897.5   -47.34    19.07
 1898.5   -42.79    17.68
 1899.5   -38.30    16.96
 1900.5   -46.80    15.94
 1901.5   -50.47    15.55
 1902.5   -48.33    15.29
 1903.5   -41.06    15.11
 1904.5   -43.76    14.63
 1905.5   -47.85    13.74
 1906.5   -41.59    12.89
 1907.5   -43.96    13.42
 1908.5   -46.57    12.59
 1909.5   -42.38    13.22
 1910.5   -44.66    12.52
 1911.5   -36.54    13.35
 1912.5   -39.73    12.03
 1913.5   -38.48    12.71
 1914.5   -30.29    13.47
 1915.5   -23.86    16.21
 1916.5   -32.59    11.32
 1917.5   -36.92    11.43
 1918.5   -33.93    11.34
 1919.5   -31.86    10.82
 1920.5   -32.41    11.55
 1921.5   -34.05    12.46
 1922.5   -35.17    11.91
 1923.5   -32.07    12.17
 1924.5   -39.55    11.55
 1925.5   -41.02    10.74
 1926.5   -35.53    12.38
 1927.5   -33.05    10.82
 1928.5   -33.92    11.55
 1929.5   -36.81    10.90
 1930.5   -29.19    12.02
 1931.5   -29.23    10.63
 1932.5   -24.31    10.68
 1933.5   -22.54    10.64
 1934.5   -28.68    10.92
 1935.5   -20.34    11.08
 1936.5   -20.57    10.77
 1937.5   -17.32    10.23
 1938.5   -12.16    10.44
 1939.5   -11.78    11.11
 1940.5   -16.47    11.00
 1941.5    -1.52     9.45
 1942.5    -0.38    10.38
 1943.5    -2.80    10.34
 1944.5    -4.69    10.97
 1945.5    -2.05     9.20
 1946.5     3.68    10.52
 1947.5     3.97    11.14
 1948.5    10.04     8.73
 1949.5     9.62     8.42
 1950.5    14.52     8.29
 1951.5    25.14     8.72
 1952.5    22.13     8.49
 1953.5    24.62     7.38
 1954.5    22.97     8.13
 1955.5    26.13     7.79
 1956.5    20.95     7.58
 1957.5    35.48     7.53
 1958.5    38.65     6.36
 1959.5    37.32     6.38
 1960.5    38.74     6.51
 1961.5    43.00     7.61
 1962.5    39.31     6.45
 1963.5    39.60     6.63
 1964.5    33.94     9.09
 1965.5    45.16     6.66
 1966.5    38.67     6.75
 1967.5    38.08     6.92
 1968.5    39.26     9.29
 1969.5    48.59     6.32
 1970.5    46.44     7.26
 1971.5    54.40     6.17
 1972.5    58.90     6.80
 1973.5    58.51     7.40
 1974.5    66.66     7.07
 1975.5    65.54     5.96
 1976.5    62.91     5.94
 1977.5    58.60     6.62
 1978.5    63.95     7.05
 1979.5    63.26     7.64
 1980.5    68.48     6.27
 1981.5    79.17     6.22
 1982.5    72.79     6.23
 1983.5    78.31     6.66
 1984.5    77.65     6.55
 1985.5    67.99     5.54
 1986.5    67.13     5.74
 1987.5    72.71     6.19
 1988.5    73.96     5.86
 1989.5    74.89     6.15
 1990.5    81.24     6.81
 1991.5    91.17     5.87
 1992.5    93.75     5.99
 1993.5    88.42     7.13
 1994.5    91.62     5.71
 1995.5    98.27     6.10
 1996.5   102.40     6.74
 1997.5   111.84     6.78
 1998.5   105.35     7.48
 1999.5   110.13     6.92
 2000.5   113.70     7.90
 2001.5   116.04     9.42
