line 1 1895 40.137 1896 39.597 1897 41.707 1898 38.967 1899 45.837 1900 42.437 1901 42.467 1902 44.667 1903 40.857 1904 43.937 1905 43.157 1906 41.487 1907 41.747 1908 43.287 1909 45.817 1910 41.997 1911 38.087 1912 43.157 1913 46.067 1914 44.457 1915 44.127 1916 41.157 1917 44.537 1918 41.317 1919 40.117 1920 40.507 1921 43.417 1922 42.697 1923 43.607 1924 43.337 1925 41.387 1926 41.447 1927 45.197 1928 42.567 1929 39.267 1930 42.067 1931 44.327 1932 41.687 1933 43.507 1934 45.947 1935 40.427 1936 40.747 1937 41.737 1938 40.937 1939 43.237 1940 40.027 1941 43.997 1942 44.087 1943 41.927 1944 42.597 1945 43.047 1946 42.767 1947 39.237 1948 42.747 1949 46.257 1950 41.617 1951 39.107 1952 41.037 1953 44.877 1954 45.017 1955 39.127 1956 41.337 1957 41.307 1958 43.987 1959 39.547 1960 43.647 1961 41.477 1962 44.067 1963 44.857 1964 43.217 1965 45.427 1966 43.997 1967 42.337 1968 41.957 1969 42.477 1970 42.137 1971 42.437 1972 39.767 1973 43.607 1974 43.137 1975 43.367 1976 39.177 1977 43.557 1978 42.157 1979 40.717 1980 43.067 1981 45.427 1982 41.887 1983 43.807 1984 42.307 1985 40.157 1986 42.027 1987 44.677 1988 44.027 1989 43.477 1990 45.577 1991 40.047 1992 40.777 1993 39.717 1994 43.377 1995 42.527 1996 40.077 1997 41.447 1998 45.477 1999 48.377 2000 38.677