- 1937 to 1939 38,379
- 1940 to 1944 44,541
- 1945 to 1949 47,580
- 1950 to 1954 50,863
- 1955 to 1959 51,854
- 1960 to 1964 58,995
- 1965 to 1969 72,753
- 1970 to 1974 72,696
- 1975 to 1979 70,866
- 1980 to 1984 64,904
- 1985 to 1989 63,234
- 1990 to 1994 63,819
- 1995 to 1999 55,313
- 2000 to 2001 36,157