Jeffrey Gardner has seen concerts during 15 years.

Year   Concerts Seen  
2023 1 concert
2022 16 concerts
2021 7 concerts
2020 2 concerts
2019 5 concerts
2018 1 concert
2017 1 concert
2016 6 concerts
2015 11 concerts
2014 7 concerts
2013 12 concerts
2012 8 concerts
2011 12 concerts
2010 6 concerts
2009 5 concerts