- 1947 to 1949 5
- 1950 to 1954 5
- 1955 to 1959 7
- 1960 to 1964 12
- 1965 to 1969 12
- 1970 to 1974 11
- 1975 to 1979 10
- 1980 to 1984 0
- 1985 to 1989 12
- 1990 to 1994 45
- 1995 to 1999 66
- 2000 to 2004 111
- 2005 to 2009 75
- 2010 to 2014 38
- 2015 to 2019 17
- 2020 to 2020 5