Derik has seen concerts during 28 years.

Year   Concerts Seen  
2024 1 concert
2023 11 concerts
2022 8 concerts
2021 3 concerts
2020 4 concerts
2019 11 concerts
2018 9 concerts
2017 1 concert
2016 4 concerts
2015 3 concerts
2014 2 concerts
2013 4 concerts
2012 2 concerts
2011 3 concerts
2010 1 concert
2009 5 concerts
2008 4 concerts
2007 6 concerts
2006 3 concerts
2005 8 concerts
2004 6 concerts
2003 6 concerts
2002 8 concerts
2001 3 concerts
2000 3 concerts
1999 1 concert
1998 2 concerts
1997 1 concert