• 1958 to 1959 62
• 1960 to 1964 540
• 1965 to 1969 539
• 1970 to 1974 389
• 1975 to 1979 351
• 1980 to 1984 401
• 1985 to 1989 395
• 1990 to 1994 409
• 1995 to 1999 371
• 2000 to 2004 324
• 2005 to 2009 2
• 2010 to 2012 4