Christopher John has seen concerts during 15 years.

Year   Concerts Seen  
2019 3 concerts
2018 2 concerts
2015 2 concerts
2014 1 concert
2013 1 concert
2012 7 concerts
2011 1 concert
2009 2 concerts
2008 1 concert
2007 2 concerts
2004 1 concert
2003 3 concerts
2001 2 concerts
2000 1 concert
1999 1 concert