Mark Ketelaars has seen concerts during 11 years.

Year   Concerts Seen  
2023 1 concert
2022 5 concerts
2021 1 concert
2019 6 concerts
2018 6 concerts
2017 12 concerts
2016 13 concerts
2015 8 concerts
2014 5 concerts
2013 3 concerts
2012 3 concerts