• 1940 to 1944 1
• 1945 to 1949 2
• 1950 to 1954 8
• 1955 to 1959 12
• 1960 to 1964 23
• 1965 to 1969 25
• 1970 to 1974 18
• 1975 to 1979 27
• 1980 to 1984 16
• 1985 to 1989 13
• 1990 to 1994 8
• 1995 to 1999 6
• 2000 to 2000 2