• 1947 to 1949 2
• 1950 to 1954 1
• 1955 to 1959 71
• 1960 to 1964 561
• 1965 to 1969 777
• 1970 to 1974 586
• 1975 to 1979 472
• 1980 to 1984 401
• 1985 to 1989 398
• 1990 to 1994 444
• 1995 to 1999 443
• 2000 to 2004 383
• 2005 to 2009 102
• 2010 to 2014 19
• 2015 to 2017 27