Year   Concerts Seen  
2021 1 concert
2015 1 concert
2014 1 concert
2012 2 concerts
2011 2 concerts
2010 1 concert
2007 1 concert
2006 5 concerts
2005 3 concerts
2003 4 concerts
2002 4 concerts
2001 1 concert
2000 4 concerts
1999 5 concerts
1998 5 concerts
1997 5 concerts
1996 5 concerts
1995 15 concerts
1994 11 concerts
1993 5 concerts
1992 10 concerts
1991 4 concerts
1990 10 concerts
1989 4 concerts
1988 3 concerts
1987 4 concerts
1986 2 concerts
1981 2 concerts
1977 1 concert
1975 1 concert
1974 3 concerts
1973 4 concerts
1972 4 concerts
1971 5 concerts
1970 4 concerts
1969 5 concerts
1968 1 concert
1967 7 concerts