Ahlgren has seen concerts during 14 years.

Year   Concerts Seen  
2024 3 concerts
2023 21 concerts
2022 18 concerts
2021 2 concerts
2019 5 concerts
2018 3 concerts
2017 2 concerts
2012 1 concert
2011 1 concert
2005 2 concerts
2004 1 concert
2002 1 concert
2000 1 concert
1997 1 concert