1898 39.5 40.3 39.1 40.0 1899 79.1 4.1 98.0 96.8 1900 92.4 80.2 95.4 95.3 1901 54.6 50.9 49.9 69.5 1902 32.2 14.8 28.3 56.6 1903 28.3 15.2 25.6 45.8 1904 81.6 38.1 91.2 95.4 1905 87.7 79.8 87.6 94.5 1906 58.9 59.9 61.9 50.7 1907 69.7 46.8 71.6 84.5 1908 47.4 29.7 46.0 65.9 1909 45.4 0.0 58.6 51.5 1910 39.0 20.8 36.0 61.8 1911 53.5 0.0 57.3 89.9 1912 98.1 95.2 98.6 99.3 1913 42.6 47.9 40.3 43.8 1914 82.8 54.3 88.8 92.3 1915 75.0 0.0 93.8 92.6 1916 88.9 74.4 91.9 93.9 1917 70.8 51.9 67.5 95.1 1918 72.4 22.1 82.4 91.0 1919 16.0 0.0 23.2 12.0 1920 75.6 63.0 74.7 88.3 1921 6.7 9.6 5.7 6.6 1922 35.9 25.2 32.7 53.1 1923 74.1 11.0 88.8 91.9 1924 79.3 66.7 81.7 84.2 1925 42.4 0.0 47.8 65.2 1926 81.7 72.7 81.6 89.8 1927 35.8 0.0 39.0 58.3 1928 53.0 51.7 48.8 64.5 1929 19.7 11.4 15.6 36.8 1930 7.0 1.3 2.0 23.9 1931 38.5 0.0 42.5 61.5 1932 10.6 36.4 6.0 0.0 1933 0.0 0.0 0.0 0.0 1934 91.8 84.1 92.0 97.6 1935 35.0 19.0 29.1 62.9 1936 64.9 21.6 71.7 85.0 1937 26.6 47.4 26.5 9.3 1938 45.8 0.0 52.9 67.4 1939 52.4 24.8 57.0 64.5 1940 94.4 88.8 95.2 97.3 1941 74.9 62.5 75.4 84.4 1942 39.8 28.1 39.7 50.0 1943 61.7 50.5 57.5 81.4 1944 54.8 42.2 50.7 75.6 1945 28.0 12.5 22.9 53.9 1946 27.7 19.4 25.6 39.8 1947 69.0 65.1 70.2 69.5 1948 78.1 70.3 77.5 86.1 1949 3.2 2.2 4.8 0.0 1950 50.0 55.6 49.1 47.3 1951 10.2 2.1 6.8 25.7 1952 50.5 49.0 45.3 64.4 1953 0.0 0.0 0.0 0.0 1954 3.0 4.7 0.0 9.0 1955 9.8 11.0 3.9 23.2 1956 69.5 21.4 79.1 86.8 1957 20.9 5.1 9.8 61.5 1958 19.7 7.9 13.9 44.2 1959 77.5 23.4 89.4 94.5 1960 80.0 72.6 81.0 84.1 1961 16.1 1.2 7.5 50.2 1962 66.7 52.5 66.2 80.2 1963 77.6 49.7 80.9 93.3 1964 39.5 25.2 36.9 58.1 1965 81.7 75.9 83.0 83.2 1966 30.5 18.6 27.1 49.2 1967 64.6 42.6 68.0 74.9 1968 73.7 37.1 80.2 89.1 1969 73.3 62.9 73.1 82.8 1970 87.6 80.7 87.3 94.1 1971 75.8 3.5 93.2 94.8 1972 60.8 46.1 55.1 87.1 1973 20.2 18.6 21.5 18.2 1974 15.3 7.3 14.2 24.9 1975 26.9 23.8 28.5 25.6 1976 11.9 3.0 6.5 32.5 1977 60.0 33.2 59.4 84.2 1978 92.3 83.9 93.7 96.0 1979 64.1 49.4 65.0 74.5 1980 58.0 49.1 52.7 78.6 1981 31.3 11.2 17.9 81.6 1982 80.8 73.6 80.9 86.9 1983 5.2 6.1 5.0 5.0 1984 76.3 70.3 79.2 74.5 1985 44.3 31.3 34.9 78.3 1986 69.3 56.1 70.0 78.9 1987 14.2 15.6 14.8 11.4 1988 47.3 36.9 38.6 77.2 1989 47.8 45.0 48.6 48.3 1990 32.2 30.6 26.5 47.5 1991 8.4 6.5 8.0 11.0 1992 18.7 23.6 16.7 19.3 1993 72.5 74.1 72.6 71.0 1994 69.0 41.9 70.8 88.0 1995 42.1 28.7 40.4 57.6 1996 65.6 47.6 66.8 77.8 1997 21.9 9.5 13.0 54.5 1998 0.0 0.0 0.0 0.1 1999 25.5 27.5 27.6 18.7 2000 3.5 2.4 2.7 6.3 2001 26.0 5.4 13.3 74.6 2002 0.3 1.1 0.0 0.3