Def15 has seen concerts during 16 years.

Year   Concerts Seen  
2024 11 concerts
2023 20 concerts
2022 13 concerts
2021 5 concerts
2020 3 concerts
2019 15 concerts
2018 19 concerts
2017 13 concerts
2016 9 concerts
2015 10 concerts
2014 11 concerts
2013 8 concerts
2012 8 concerts
2011 3 concerts
2010 1 concert
2009 1 concert