Bas Derkink has seen concerts during 26 years.

Year   Concerts Seen  
2024 9 concerts
2023 10 concerts
2022 8 concerts
2021 2 concerts
2020 2 concerts
2019 9 concerts
2018 5 concerts
2017 12 concerts
2016 6 concerts
2015 8 concerts
2014 4 concerts
2013 4 concerts
2012 1 concert
2011 2 concerts
2010 2 concerts
2009 4 concerts
2008 3 concerts
2007 3 concerts
2006 2 concerts
2005 1 concert
2004 2 concerts
2003 1 concert
2001 1 concert
1999 2 concerts
1996 1 concert
1990 1 concert