Jeffery Mattis has seen concerts during 20 years.

Year   Concerts Seen  
2023 4 concerts
2022 2 concerts
2021 1 concert
2019 1 concert
2018 4 concerts
2017 4 concerts
2016 1 concert
2015 3 concerts
2013 1 concert
2012 3 concerts
2011 3 concerts
2010 1 concert
2009 1 concert
2008 2 concerts
2007 1 concert
2003 1 concert
1980 2 concerts
1977 3 concerts
1975 2 concerts
1974 2 concerts