Year   Concerts Seen  
2019 1 concert
2018 1 concert
2017 2 concerts
2015 2 concerts
2014 2 concerts
2013 1 concert
2010 1 concert
2007 1 concert
2006 2 concerts
1997 1 concert
1993 1 concert
1992 2 concerts
1991 1 concert
1986 1 concert
1983 1 concert
1982 2 concerts
1981 1 concert
1980 1 concert
1979 1 concert
1978 1 concert
1977 1 concert