• 1967 to 1969 14
• 1970 to 1974 30
• 1975 to 1979 42
• 1980 to 1984 56
• 1985 to 1989 54
• 1990 to 1994 73
• 1995 to 1999 85
• 2000 to 2004 86
• 2005 to 2009 113
• 2010 to 2014 218
• 2015 to 2019 135