William F Strasburg has seen concerts during 17 years.

Year   Concerts Seen  
2018 2 concerts
2011 4 concerts
2005 1 concert
2004 1 concert
2003 1 concert
1998 3 concerts
1997 2 concerts
1996 1 concert
1995 1 concert
1994 1 concert
1990 1 concert
1985 2 concerts
1984 1 concert
1983 1 concert
1981 2 concerts
1979 4 concerts
1978 3 concerts