Year   Concerts Seen  
2018 2 concerts
2017 14 concerts
1987 6 concerts
1986 5 concerts
1985 1 concert
1984 6 concerts
1983 4 concerts
1982 3 concerts
1981 2 concerts
1979 2 concerts
1978 2 concerts
1975 4 concerts
1974 4 concerts
1972 1 concert