Jon Walworth has seen concerts during 26 years.

Year   Concerts Seen  
2015 1 concert
2014 7 concerts
2013 9 concerts
2012 7 concerts
2011 5 concerts
2010 7 concerts
2009 1 concert
2008 2 concerts
2007 4 concerts
2006 4 concerts
2005 4 concerts
2004 2 concerts
2003 4 concerts
2002 1 concert
2001 2 concerts
2000 3 concerts
1998 5 concerts
1997 2 concerts
1996 3 concerts
1995 5 concerts
1994 5 concerts
1993 5 concerts
1992 6 concerts
1991 3 concerts
1990 4 concerts
1989 2 concerts