Year   Concerts Seen  
2011 1 concert
2010 1 concert
2009 1 concert
2008 2 concerts
2007 4 concerts
2006 2 concerts
2005 1 concert
2004 1 concert
2003 4 concerts
2002 4 concerts
2001 4 concerts
2000 1 concert
1999 4 concerts
1998 1 concert
1997 2 concerts
1996 1 concert
1989 1 concert
1975 2 concerts
1972 1 concert
1970 2 concerts