1900	62.266
1901	61.532
1902	62.696
1903	60.486
1904	60.946
1905	60.097
1906	60.401
1907	56.921
1908	59.782
1909	58.956
1910	60.026
1911	62.02
1912	61.453
1913	60.83
1914	62.155
1915	59.197
1916	60.225
1917	56.212
1918	61.576
1919	60.944
1920	60.073
1921	60.912
1922	62.148
1923	60.31
1924	58.914
1925	60.778
1926	61.66
1927	60.468
1928	62.089
1929	59.848
1930	60.257
1931	60.518
1932	61.387
1933	60.973
1934	65.211
1935	58.451
1936	64.108
1937	62.701
1938	60.838
1939	63.36
1940	61.633
1941	63.134
1942	60.324
1943	60.797
1944	63.002
1945	59.235
1946	59.951
1947	61.068
1948	61.255
1949	62.662
1950	60.522
1951	61.731
1952	61.48
1953	60.371
1954	59.568
1955	62.196
1956	62.363
1957	60.848
1958	63.17
1959	61.947
1960	60.484
1961	59.928
1962	63.012
1963	61.818
1964	62.417
1965	61.829
1966	60.995
1967	58.678
1968	59.423
1969	62.267
1970	62.002
1971	59.602
1972	61.681
1973	60.413
1974	61.229
1975	61.759
1976	60.271
1977	62.754
1978	61.098
1979	60.442
1980	61.581
1981	60.359
1982	62.008
1983	59.389
1984	61.33
1985	63.202
1986	62.411
1987	63.962
1988	62.389
1989	61.815
1990	60.239
1991	63.331
1992	62.15
1993	62.237
1994	61.851
1995	60.26
1996	62.046
1997	60.596
1998	63.75
1999	61.475
2000	64.675