
1961 453
1962 321
1963 594
1964 911
1965 696
1966 1,057
1967 1,307
1968 1,539
1969 1,822
1970 1,952
1971 1,962
1972 2,454
1973 2,020
1974 2,272
1975 3,372
1976 2,073
1977 2,227
1978 2,213
1979 1,841
1980 1,259
1981 1,232
1982 1,450
1983 1,248
1984 1,122
1985 1,014
1986 1,171
1987 1,767
1988 1,782
1989 1,544
1990 1,610
1991 1,851
1992 2,660
1993 2,282
1994 2,720
1995 2,379
1996 1,964
1997 1,854
1998 2,079
1999 2,219