- 1937 to 1939 38,325
- 1940 to 1944 44,301
- 1945 to 1949 47,327
- 1950 to 1954 50,497
- 1955 to 1959 51,490
- 1960 to 1964 58,612
- 1965 to 1969 72,299
- 1970 to 1974 72,157
- 1975 to 1979 70,172
- 1980 to 1984 64,307
- 1985 to 1989 62,667
- 1990 to 1994 63,052
- 1995 to 1999 54,418
- 2000 to 2001 35,532