1898 0.0 0.0 0.0 0.0 1899 53.6 0.0 63.4 75.3 1900 36.9 7.8 36.3 63.5 1901 3.0 0.0 0.0 13.1 1902 1.7 0.0 0.0 7.4 1903 0.4 0.0 0.0 1.9 1904 28.1 0.0 25.0 59.9 1905 24.1 5.1 17.5 56.6 1906 14.7 17.1 11.2 21.4 1907 9.0 0.0 2.5 32.7 1908 2.3 0.0 0.0 10.0 1909 4.8 0.0 3.3 12.5 1910 2.2 0.0 0.0 9.4 1911 14.5 0.0 0.0 62.6 1912 46.7 25.0 44.5 70.5 1913 0.3 0.4 0.0 1.0 1914 21.2 0.0 16.8 50.1 1915 35.6 0.0 39.0 57.4 1916 29.3 7.4 25.6 57.4 1917 14.4 0.0 2.8 55.1 1918 20.3 0.0 14.1 52.6 1919 0.0 0.0 0.0 0.0 1920 14.6 0.3 6.7 46.5 1921 0.0 0.0 0.0 0.0 1922 0.9 0.0 0.0 3.7 1923 36.5 0.0 37.9 64.5 1924 13.9 0.8 9.8 35.2 1925 2.4 0.0 0.0 10.1 1926 15.8 2.5 8.8 44.4 1927 1.7 0.0 0.0 7.3 1928 2.6 1.2 0.0 10.3 1929 0.0 0.0 0.0 0.1 1930 0.0 0.0 0.0 0.0 1931 2.3 0.0 0.0 10.1 1932 0.3 1.3 0.0 0.0 1933 0.0 0.0 0.0 0.0 1934 36.3 19.7 30.1 65.8 1935 2.1 0.0 0.0 8.9 1936 11.9 0.0 4.8 39.7 1937 2.5 4.9 1.7 2.4 1938 2.5 0.0 0.0 10.9 1939 7.4 0.0 3.2 24.2 1940 39.3 21.7 34.1 67.1 1941 14.2 0.9 8.2 40.2 1942 0.5 0.0 0.0 2.4 1943 6.5 0.0 0.0 27.8 1944 6.8 0.0 0.0 29.2 1945 1.1 0.0 0.0 4.8 1946 0.0 0.0 0.0 0.0 1947 7.3 0.8 4.1 20.8 1948 10.4 1.3 5.6 29.8 1949 0.0 0.0 0.0 0.0 1950 4.8 8.8 0.6 11.7 1951 0.0 0.0 0.0 0.0 1952 3.0 0.4 0.0 12.8 1953 0.0 0.0 0.0 0.0 1954 0.0 0.0 0.0 0.0 1955 0.0 0.0 0.0 0.0 1956 19.6 0.0 14.3 49.4 1957 2.2 0.0 0.0 9.4 1958 0.2 0.0 0.0 1.0 1959 21.6 0.0 16.4 52.9 1960 25.1 11.6 21.8 44.7 1961 1.2 0.0 0.0 5.2 1962 6.8 0.0 1.1 26.5 1963 18.2 0.0 10.6 52.4 1964 1.5 0.0 0.0 6.3 1965 39.2 13.7 39.3 60.6 1966 0.6 0.0 0.0 2.5 1967 6.0 0.0 3.5 17.5 1968 12.1 0.0 6.7 35.7 1969 8.9 0.1 3.5 29.5 1970 21.3 5.5 13.7 53.4 1971 30.1 0.0 28.8 58.9 1972 16.1 0.0 0.0 69.5 1973 -1.0 -1.0 -1.0 -1.0 1974 1.5 1.2 1.2 2.4 1975 -1.0 -1.0 -1.0 -1.0 1976 -1.0 -1.0 -1.0 -1.0 1977 10.3 5.0 7.7 21.2 1978 31.5 20.7 28.4 48.5 1979 7.5 5.0 5.4 14.8 1980 -1.0 -1.0 -1.0 -1.0 1981 -1.0 -1.0 -1.0 -1.0 1982 20.2 12.0 12.9 45.2 1983 5.0 5.0 5.0 5.0 1984 18.6 15.0 16.8 26.2 1985 10.2 5.0 5.6 26.2 1986 -1.0 -1.0 -1.0 -1.0 1987 -1.0 -1.0 -1.0 -1.0 1988 -1.0 -1.0 -1.0 -1.0 1989 2.5 2.5 2.5 2.6 1990 2.1 2.0 2.0 2.4 1991 1.4 1.4 1.4 1.5 1992 2.6 2.8 2.5 2.8 1993 7.3 10.5 6.3 7.3 1994 15.5 2.5 9.2 41.9 1995 2.7 2.3 2.3 4.3 1996 11.3 2.6 7.6 27.8 1997 1.8 0.0 0.0 7.8 1998 -1.0 -1.0 -1.0 -1.0 1999 0.0 0.0 0.0 0.0 2000 0.0 0.0 0.0 0.0 2001 6.2 0.0 0.6 25.2 2002 0.0 0.0 0.0 0.0