• 1947 to 1949 3
• 1950 to 1954 4
• 1955 to 1959 5
• 1960 to 1964 5
• 1965 to 1969 4
• 1970 to 1974 9
• 1975 to 1979 9
• 1980 to 1984 5
• 1985 to 1989 0
• 1990 to 1994 0
• 1995 to 1999 0
• 2000 to 2004 0
• 2005 to 2009 0
• 2010 to 2010 1