John Wyckoff has seen concerts during 18 years.

Year   Concerts Seen  
2023 1 concert
2021 1 concert
2019 1 concert
2017 1 concert
2016 1 concert
2015 2 concerts
2014 2 concerts
2013 2 concerts
2009 1 concert
2007 1 concert
2005 1 concert
2002 1 concert
1993 1 concert
1989 2 concerts
1988 2 concerts
1982 1 concert
1974 1 concert
1972 1 concert