Jack has seen concerts during 19 years.

Year   Concerts Seen  
2024 21 concerts
2023 27 concerts
2022 19 concerts
2021 2 concerts
2019 4 concerts
2018 2 concerts
2017 4 concerts
2016 5 concerts
2015 4 concerts
2014 6 concerts
2013 9 concerts
2012 1 concert
2010 1 concert
2009 1 concert
2008 2 concerts
2006 3 concerts
2004 1 concert
2003 1 concert
2002 1 concert