1897 6.0 19.5 3.7 0.0 1898 24.7 51.4 25.4 0.0 1899 1.6 7.9 0.0 0.0 1900 4.7 23.9 0.0 0.0 1901 15.5 29.0 17.2 0.0 1902 9.0 30.8 5.2 0.0 1903 34.1 58.9 32.6 16.7 1904 27.7 40.0 27.6 17.5 1905 0.0 0.0 0.0 0.0 1906 2.7 13.8 0.0 0.0 1907 0.3 1.5 0.0 0.0 1908 2.0 10.2 0.0 0.0 1909 16.7 40.4 14.3 2.2 1910 29.8 42.5 31.4 15.0 1911 0.0 0.0 0.0 0.0 1912 0.3 1.4 0.0 0.0 1913 0.0 0.0 0.0 0.0 1914 18.8 31.8 19.0 7.3 1915 4.7 23.8 0.0 0.0 1916 17.6 30.8 19.3 2.2 1917 39.4 44.6 42.6 27.2 1918 0.0 0.0 0.0 0.0 1919 26.3 42.6 25.4 14.8 1920 2.1 10.6 0.0 0.0 1921 1.8 8.9 0.0 0.0 1922 5.0 25.5 0.0 0.0 1923 0.0 0.0 0.0 0.0 1924 8.5 19.5 7.2 2.1 1925 4.3 14.6 2.5 0.0 1926 17.2 29.9 19.0 2.0 1927 2.3 11.7 0.0 0.0 1928 0.0 0.0 0.0 0.0 1929 9.9 50.2 0.0 0.0 1930 5.3 26.6 0.0 0.0 1931 0.0 0.0 0.0 0.0 1932 10.9 31.3 8.2 0.0 1933 2.1 10.5 0.0 0.0 1934 10.4 35.0 6.2 0.0 1935 12.3 21.6 12.2 4.6 1936 7.5 38.1 0.0 0.0 1937 21.3 40.7 23.2 0.0 1938 1.2 6.1 0.0 0.0 1939 0.9 4.4 0.0 0.0 1940 1.4 7.3 0.0 0.0 1941 0.0 0.0 0.0 0.0 1942 21.6 49.4 20.8 0.0 1943 12.1 30.7 10.5 0.0 1944 10.5 27.8 8.7 0.0 1945 21.4 34.2 21.5 10.2 1946 1.4 7.3 0.0 0.0 1947 4.6 23.4 0.0 0.0 1948 1.7 8.8 0.0 0.0 1949 0.0 0.0 0.0 0.0 1950 23.8 54.4 21.2 4.2 1951 18.0 31.6 19.4 3.0 1952 0.0 0.0 0.0 0.0 1953 4.1 20.7 0.0 0.0 1954 2.9 14.8 0.0 0.0 1955 15.9 37.1 14.7 1.0 1956 0.6 2.9 0.0 0.0 1957 0.3 1.5 0.0 0.0 1958 42.3 61.8 42.3 25.8 1959 0.0 0.0 0.0 0.0 1960 22.8 37.3 22.1 12.1 1961 4.1 17.2 1.2 0.0 1962 19.0 38.1 17.8 5.6 1963 21.5 34.4 23.4 5.9 1964 8.1 41.0 0.0 0.0 1965 0.0 0.0 0.0 0.0 1966 3.6 18.1 0.0 0.0 1967 1.5 7.5 0.0 0.0 1968 7.2 29.5 2.4 0.0 1969 10.1 19.7 9.5 3.2 1970 1.8 9.2 0.0 0.0 1971 0.0 0.0 0.0 0.0 1972 -1.0 -1.0 -1.0 -1.0 1973 -1.0 -1.0 -1.0 -1.0 1974 -1.0 -1.0 -1.0 -1.0 1975 -1.0 -1.0 -1.0 -1.0 1976 -1.0 -1.0 -1.0 -1.0 1977 -1.0 -1.0 -1.0 -1.0 1978 -1.0 -1.0 -1.0 -1.0 1979 -1.0 -1.0 -1.0 -1.0 1980 -1.0 -1.0 -1.0 -1.0 1981 -1.0 -1.0 -1.0 -1.0 1982 -1.0 -1.0 -1.0 -1.0 1983 -1.0 -1.0 -1.0 -1.0 1984 -1.0 -1.0 -1.0 -1.0 1985 -1.0 -1.0 -1.0 -1.0 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 -1.0 -1.0 -1.0 -1.0 1990 -1.0 -1.0 -1.0 -1.0 1991 2.9 5.3 2.3 2.3 1992 -1.0 -1.0 -1.0 -1.0 1993 2.2 4.9 1.5 1.5 1994 0.7 0.7 0.7 0.7 1995 11.2 49.3 1.9 1.4 1996 2.0 10.1 0.0 0.1 1997 -1.0 -1.0 -1.0 -1.0 1998 -1.0 -1.0 -1.0 -1.0 1999 1.4 6.9 0.0 0.1 2000 18.6 43.4 14.0 8.7 2001 0.2 0.8 0.0 0.2