• 1946 to 1949 1
• 1950 to 1954 0
• 1955 to 1959 0
• 1960 to 1964 0
• 1965 to 1969 3
• 1970 to 1974 4
• 1975 to 1979 2
• 1980 to 1984 16
• 1985 to 1989 136
• 1990 to 1994 100
• 1995 to 1999 175
• 2000 to 2004 186
• 2005 to 2009 261
• 2010 to 2014 314
• 2015 to 2018 220