Kopper has seen concerts during 35 years.

Year   Concerts Seen  
2023 2 concerts
2022 1 concert
2017 2 concerts
2014 2 concerts
2010 2 concerts
2009 4 concerts
2008 8 concerts
2007 5 concerts
2006 4 concerts
2005 2 concerts
2004 1 concert
2003 4 concerts
2002 2 concerts
2001 1 concert
2000 15 concerts
1999 10 concerts
1998 8 concerts
1997 10 concerts
1996 10 concerts
1995 2 concerts
1994 2 concerts
1993 1 concert
1992 6 concerts
1991 7 concerts
1990 4 concerts
1989 5 concerts
1988 4 concerts
1987 12 concerts
1986 3 concerts
1985 5 concerts
1984 1 concert
1983 2 concerts
1982 1 concert
1981 1 concert
1980 1 concert