1895	54.499
1896	56.104
1897	55.395
1898	56.048
1899	54.241
1900	56.307
1901	55.593
1902	55.225
1903	54.378
1904	54.51
1905	54.804
1906	55.44
1907	55.049
1908	55.943
1909	55.56
1910	56.347
1911	56.569
1912	53.523
1913	55.113
1914	56.061
1915	54.827
1916	55.149
1917	53.844
1918	55.374
1919	56.063
1920	54.663
1921	57.674
1922	55.63
1923	55.183
1924	54.32
1925	57.245
1926	55.971
1927	56.008
1928	55.567
1929	54.571
1930	56.331
1931	57.19
1932	56.184
1933	56.601
1934	58.053
1935	56.21
1936	56.147
1937	55.419
1938	57.244
1939	56.869
1940	55.409
1941	56.213
1942	55.488
1943	56.163
1944	55.84
1945	55.923
1946	56.894
1947	55.654
1948	55.535
1949	55.533
1950	54.829
1951	55.262
1952	56.521
1953	57.1
1954	57.163
1955	55.884
1956	55.858
1957	55.92
1958	55.661
1959	56.095
1960	55.188
1961	56.044
1962	55.288
1963	55.925
1964	55.5
1965	54.672
1966	55.171
1967	55.685
1968	55.293
1969	55.464
1970	55.541
1971	55.243
1972	55.89
1973	55.837
1974	56.085
1975	54.89
1976	56.213
1977	56.457
1978	54.899
1979	54.103
1980	56.192
1981	57.137
1982	54.78
1983	56.308
1984	55.727
1985	55.58
1986	57.5
1987	57.32
1988	56.435
1989	55.937
1990	57.739
1991	57.248
1992	56.858
1993	55.087
1994	56.495
1995	56.602
1996	55.795
1997	56.11
1998	58.017
1999	57.185
2000	58.315