Helder has seen concerts during 23 years.

Year   Concerts Seen  
2023 6 concerts
2022 2 concerts
2021 1 concert
2019 3 concerts
2018 3 concerts
2017 3 concerts
2016 2 concerts
2015 4 concerts
2014 1 concert
2013 1 concert
2012 3 concerts
2010 5 concerts
2009 9 concerts
2008 9 concerts
2007 14 concerts
2006 14 concerts
2005 11 concerts
2004 5 concerts
2003 12 concerts
2002 2 concerts
2001 2 concerts
2000 2 concerts
1999 1 concert