- 1937 to 1939 38,328
- 1940 to 1944 44,303
- 1945 to 1949 47,329
- 1950 to 1954 50,504
- 1955 to 1959 51,517
- 1960 to 1964 58,647
- 1965 to 1969 72,388
- 1970 to 1974 72,350
- 1975 to 1979 70,318
- 1980 to 1984 64,374
- 1985 to 1989 62,758
- 1990 to 1994 63,311
- 1995 to 1999 54,721
- 2000 to 2001 35,681