John Knowles has seen concerts during 12 years.

Year   Concerts Seen  
2025 1 concert
2024 6 concerts
2023 2 concerts
2022 2 concerts
2021 1 concert
2020 2 concerts
2014 1 concert
2004 3 concerts
2003 1 concert
1999 2 concerts
1997 1 concert
1996 1 concert