1950 1421 1955 1496 1960 1753 1961 2049 1962 2073 1963 2106 1964 2185 1965 2214 1966 2189 1967 2238 1968 2505 1969 2561 1970 2640 1971 2534 1972 2532 1973 2586 1974 2628 1975 2579 1976 2687 1977 2712 1978 2795 1979 2880 1980 2929 1981 2926 1982 2928 1983 3039 1984 3153 1985 3180 1986 3267 1987 3338 1988 3386 1989 3451 1990 3507 1991 3429 1992 3476