Year   Concerts Seen  
2019 1 concert
2017 1 concert
2015 1 concert
2014 1 concert
2013 1 concert
2012 1 concert
2011 1 concert
2009 1 concert
2007 1 concert
2005 1 concert
1998 1 concert
1994 2 concerts
1991 4 concerts
1990 4 concerts
1989 9 concerts
1988 9 concerts
1987 8 concerts
1986 10 concerts
1985 3 concerts
1975 1 concert