Derek Strogis has seen concerts during 13 years.

Year   Concerts Seen  
2020 1 concert
2019 8 concerts
2018 5 concerts
2017 7 concerts
2016 5 concerts
2015 2 concerts
2014 1 concert
2013 1 concert
2012 1 concert
2009 2 concerts
2007 3 concerts
2006 2 concerts
2005 2 concerts