Mark Litterer has seen concerts during 24 years.

Year   Concerts Seen  
2020 1 concert
2019 2 concerts
2018 2 concerts
2015 3 concerts
2014 2 concerts
2013 3 concerts
2012 3 concerts
2011 1 concert
2010 1 concert
2008 2 concerts
2007 1 concert
2004 2 concerts
2000 1 concert
1998 2 concerts
1997 1 concert
1996 2 concerts
1990 1 concert
1989 1 concert
1988 2 concerts
1985 1 concert
1983 2 concerts
1982 5 concerts
1981 6 concerts
1980 2 concerts