- 1937 to 1939 38,368
- 1940 to 1944 44,354
- 1945 to 1949 47,394
- 1950 to 1954 50,584
- 1955 to 1959 51,568
- 1960 to 1964 58,696
- 1965 to 1969 72,441
- 1970 to 1974 72,398
- 1975 to 1979 70,319
- 1980 to 1984 64,375
- 1985 to 1989 62,759
- 1990 to 1994 63,312
- 1995 to 1999 54,722
- 2000 to 2001 35,682