John Y. has seen concerts during 23 years.

Year   Concerts Seen  
2024 1 concert
2023 3 concerts
2022 7 concerts
2019 10 concerts
2018 12 concerts
2017 3 concerts
2016 3 concerts
2015 1 concert
2014 2 concerts
2013 2 concerts
2012 6 concerts
2011 5 concerts
2010 12 concerts
2009 5 concerts
2008 5 concerts
2007 7 concerts
2006 6 concerts
2005 3 concerts
2004 7 concerts
2003 11 concerts
2002 17 concerts
2000 1 concert
1999 1 concert