1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 | 589 48.8 562.1 227.7 247.7 376.1 2 912.3 1 935.1 1 714.1 1 900.8 1 917.7 1 777.8 4 053.4 1 000 | 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 | 1 001 870 870 1 070 1 120 3 560 3 970 4 260 4 260 4 210 4 500 6 550 5 350 4 280 | 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 | 4 280 4 000 4 000 4 000 4 500 4 287 4 587 5 087 5 587 7 029 14 850 15 050 5 845 6 345 |