Billy Oleson has seen concerts during 25 years.

Year   Concerts Seen  
2024 1 concert
2023 4 concerts
2022 2 concerts
2020 1 concert
2019 4 concerts
2018 2 concerts
2017 7 concerts
2016 3 concerts
2015 1 concert
2014 3 concerts
2013 2 concerts
2012 2 concerts
2011 2 concerts
2010 2 concerts
2009 2 concerts
2008 3 concerts
2007 2 concerts
2006 2 concerts
2005 1 concert
2004 1 concert
2003 4 concerts
2002 5 concerts
2001 6 concerts
2000 5 concerts
1998 5 concerts