Mark Williamson has seen concerts during 34 years.

Year   Concerts Seen  
2024 3 concerts
2023 15 concerts
2022 19 concerts
2021 5 concerts
2020 1 concert
2019 6 concerts
2018 9 concerts
2017 10 concerts
2016 8 concerts
2015 8 concerts
2014 4 concerts
2013 5 concerts
2012 5 concerts
2011 2 concerts
2010 6 concerts
2009 10 concerts
2008 3 concerts
2007 6 concerts
2006 4 concerts
2005 3 concerts
2004 3 concerts
2003 7 concerts
2002 4 concerts
2001 4 concerts
2000 1 concert
1999 5 concerts
1998 2 concerts
1997 11 concerts
1996 10 concerts
1995 3 concerts
1994 2 concerts
1992 1 concert
1990 1 concert
1989 1 concert