Year   Concerts Seen  
2021 4 concerts
2019 3 concerts
2018 4 concerts
2017 1 concert
2015 2 concerts
2014 3 concerts
2013 1 concert
2009 1 concert
1999 1 concert
1998 1 concert
1997 3 concerts
1996 3 concerts
1995 7 concerts
1994 5 concerts
1993 1 concert
1991 1 concert
1987 1 concert
1975 4 concerts
1974 10 concerts
1973 6 concerts
1972 1 concert
1970 1 concert