Gregg Wilson has seen concerts during 21 years.

Year   Concerts Seen  
2024 2 concerts
2023 4 concerts
2017 1 concert
2013 1 concert
2011 1 concert
2003 1 concert
2002 1 concert
1998 1 concert
1993 1 concert
1991 1 concert
1988 1 concert
1985 1 concert
1982 3 concerts
1981 3 concerts
1980 1 concert
1979 1 concert
1978 6 concerts
1977 9 concerts
1976 7 concerts
1975 3 concerts
1974 3 concerts