Mystery2021 has seen concerts during 15 years.

Year   Concerts Seen  
2019 1 concert
2015 2 concerts
2012 1 concert
2011 3 concerts
2010 2 concerts
2009 1 concert
2008 1 concert
2005 1 concert
2004 2 concerts
2002 2 concerts
1996 1 concert
1993 1 concert
1991 2 concerts
1987 1 concert
1986 1 concert