1863	46.31
1864	38.42
1865	49.65
1866	41.51
1867	49.94
1868	48.43
1869	45.41
1870	48.62
1871	48.84
1872	43.90
1873	51.53
1874	35.87
1875	40.02
1876	39.61
1877	47.38
1878	36.93
1879	41.79
1880	31.25
1881	40.06
1882	39.45
1883	40.86
1884	48.28
1885	39.03
1886	40.03
1887	42.88
1888	51.78
1889	64.72
1890	45.92
1891	48.79
1892	36.01
1893	38.39
1894	51.09
1895	33.07
1896	33.12
1897	47.91
1898	45.57
1899	44.48
1900	35.11
1901	43.68
1902	52.66
1903	45.91
1904	41.67
1905	38.38
1906	43.52
1907	44.11
1908	35.67
1909	31.88
1910	34.61
1911	45.11
1912	46.83
1913	42.66
1914	31.19
1915	44.42
1916	41.52
1917	32.84
1918	33.90
1919	41.20
1920	37.91
1921	35.32
1922	33.76
1923	31.22
1924	40.99
1925	40.11
1926	40.30
1927	35.78
1928	39.96
1929	40.27
1930	25.75
1931	32.23
1932	44.23
1933	43.27
1934	44.49
1935	37.83
1936	42.04
1937	41.39
1938	43.57
1939	40.44
1940	39.26
1941	31.12
1942	52.65
1943	32.39
1944	40.92
1945	48.98
1946	36.81
1947	44.53
1948	47.04
1949	37.97
1950	41.82
1951	43.73
1952	54.31
1953	49.12
1954	34.94
1955	42.82
1956	44.32
1957	30.99
1958	43.91
1959	35.89
1960	39.26
1961	38.58
1962	40.08
1963	33.22
1964	33.32
1965	27.01
1966	34.17
1967	38.21
1968	34.08
1969	39.08
1970	36.84
1971	45.45
1972	53.12
1973	50.12
1974	38.56
1975	52.86
1976	42.64
1977	42.65
1978	43.46
1979	48.08
1980	31.84
1981	33.97
1982	40.18
1983	49.08
1984	47.85
1985	39.90
1986	45.43
1987	39.80
1988	38.32
1989	47.24
1990	46.00
1991	35.76
1992	39.08
1993	47.78
1994	49.18
1995	40.16
1996	60.46
1997	33.31
1998	41.89
1999	36.58