John Klaus has seen concerts during 18 years.

Year   Concerts Seen  
2024 6 concerts
2023 7 concerts
2022 3 concerts
2021 4 concerts
2020 2 concerts
2019 6 concerts
2018 12 concerts
2017 16 concerts
2016 21 concerts
2015 20 concerts
2014 12 concerts
2013 17 concerts
2012 12 concerts
2011 4 concerts
2010 2 concerts
2009 3 concerts
2008 4 concerts
2007 1 concert