1895	50.261
1896	52.665
1897	51.416
1898	52.182
1899	50.101
1900	52.485
1901	51.839
1902	51.698
1903	50.658
1904	50.559
1905	50.559
1906	51.392
1907	51.344
1908	52.331
1909	51.664
1910	52.754
1911	53.011
1912	49.682
1913	51.114
1914	52.456
1915	51.112
1916	51.396
1917	49.756
1918	51.838
1919	52.238
1920	50.706
1921	54.218
1922	51.368
1923	51.345
1924	50.419
1925	53.719
1926	52.328
1927	52.658
1928	52.002
1929	50.565
1930	52.452
1931	53.339
1932	52.461
1933	52.664
1934	54.834
1935	52.425
1936	51.879
1937	51.029
1938	53.366
1939	52.949
1940	51.431
1941	52.574
1942	51.805
1943	52.349
1944	51.998
1945	52.142
1946	53.595
1947	51.286
1948	51.491
1949	51.818
1950	51.241
1951	51.469
1952	52.686
1953	53.502
1954	53.515
1955	51.719
1956	52.109
1957	52.311
1958	51.568
1959	52.244
1960	50.992
1961	52.438
1962	51.448
1963	51.968
1964	51.986
1965	51.145
1966	51.426
1967	52.094
1968	51.695
1969	51.321
1970	51.525
1971	51.358
1972	52.219
1973	52.049
1974	52.996
1975	51.189
1976	52.814
1977	52.741
1978	50.735
1979	49.799
1980	52.209
1981	53.719
1982	50.808
1983	52.112
1984	51.995
1985	52.172
1986	54.394
1987	53.952
1988	52.644
1989	52.414
1990	54.121
1991	53.728
1992	53.735
1993	51.325
1994	52.798
1995	52.752
1996	52.156
1997	52.225
1998	54.008
1999	53.749
2000	54.849