Therra has seen concerts during 36 years.

Year   Concerts Seen  
2023 3 concerts
2022 3 concerts
2021 3 concerts
2019 1 concert
2018 1 concert
2017 3 concerts
2016 4 concerts
2015 2 concerts
2013 1 concert
2012 2 concerts
2011 3 concerts
2010 1 concert
2009 3 concerts
2008 1 concert
2007 1 concert
2006 3 concerts
2005 2 concerts
2003 2 concerts
2002 1 concert
2001 4 concerts
1996 1 concert
1995 1 concert
1992 1 concert
1989 1 concert
1988 1 concert
1987 3 concerts
1986 5 concerts
1984 3 concerts
1983 1 concert
1982 3 concerts
1981 7 concerts
1980 2 concerts
1979 1 concert
1978 10 concerts
1977 4 concerts
1976 1 concert