- 1937 to 1939 38,379
- 1940 to 1944 44,364
- 1945 to 1949 47,404
- 1950 to 1954 50,686
- 1955 to 1959 51,677
- 1960 to 1964 58,818
- 1965 to 1969 72,573
- 1970 to 1974 72,510
- 1975 to 1979 70,659
- 1980 to 1984 64,706
- 1985 to 1989 63,017
- 1990 to 1994 63,607
- 1995 to 1999 55,110
- 2000 to 2001 35,965