Dan Patterson has seen concerts during 23 years.

Year   Concerts Seen  
2023 1 concert
2022 6 concerts
2021 3 concerts
2020 1 concert
2019 3 concerts
2018 5 concerts
2017 7 concerts
2016 4 concerts
2015 9 concerts
2014 3 concerts
2013 3 concerts
2012 5 concerts
2011 9 concerts
2010 8 concerts
2009 6 concerts
2008 7 concerts
2007 2 concerts
2006 4 concerts
2005 4 concerts
2004 4 concerts
2003 11 concerts
2002 10 concerts
2001 5 concerts