• 1947 to 1949 2
• 1950 to 1954 4
• 1955 to 1959 76
• 1960 to 1964 565
• 1965 to 1969 781
• 1970 to 1974 590
• 1975 to 1979 478
• 1980 to 1984 406
• 1985 to 1989 403
• 1990 to 1994 450
• 1995 to 1999 450
• 2000 to 2004 391
• 2005 to 2009 109
• 2010 to 2014 24
• 2015 to 2019 28