Derek Hansen has seen concerts during 20 years.

Year   Concerts Seen  
2024 10 concerts
2023 1 concert
2022 3 concerts
2019 1 concert
2018 5 concerts
2017 5 concerts
2014 1 concert
2013 1 concert
2012 1 concert
2011 1 concert
2010 2 concerts
2009 1 concert
2008 3 concerts
2006 1 concert
2005 2 concerts
2004 2 concerts
2003 2 concerts
2001 1 concert
2000 3 concerts
1999 1 concert