1950 168 1955 267 1960 411 1961 446 1962 486 1963 511 1964 556 1965 595 1966 642 1967 691 1968 763 1969 833 1970 920 1971 992 1972 1049 1973 1112 1974 1126 1975 1129 1976 1174 1977 1205 1978 1239 1979 1324 1980 1357 1981 1398 1982 1385 1983 1393 1984 1520 1985 1573 1986 1608 1987 1685 1988 1768 1989 1828 1990 1865 1991 1920 1992 1936 1993 1974