Year   Concerts Seen  
2019 1 concert
2009 1 concert
2008 3 concerts
2007 3 concerts
2006 2 concerts
2005 1 concert
2004 1 concert
2003 1 concert
2001 1 concert
1990 1 concert
1988 2 concerts
1987 1 concert
1986 3 concerts
1985 1 concert
1984 2 concerts
1983 2 concerts
1982 3 concerts
1981 2 concerts
1980 4 concerts
1979 5 concerts
1973 1 concert