Mark Harris has seen concerts during 23 years.

Year   Concerts Seen  
2024 1 concert
2023 3 concerts
2022 4 concerts
2019 1 concert
2018 1 concert
2017 3 concerts
2016 1 concert
2015 3 concerts
2014 1 concert
2012 1 concert
2009 2 concerts
2008 1 concert
2003 3 concerts
2002 1 concert
2001 2 concerts
1999 1 concert
1998 2 concerts
1997 2 concerts
1996 2 concerts
1995 4 concerts
1994 5 concerts
1993 4 concerts
1992 1 concert