John Collins has seen concerts during 26 years.

Year   Concerts Seen  
2019 7 concerts
2010 14 concerts
2009 30 concerts
2008 38 concerts
2007 50 concerts
2006 43 concerts
2005 39 concerts
2004 33 concerts
2003 49 concerts
2002 22 concerts
2001 43 concerts
2000 44 concerts
1999 20 concerts
1998 23 concerts
1997 16 concerts
1996 13 concerts
1995 5 concerts
1994 1 concert
1993 8 concerts
1992 19 concerts
1991 32 concerts
1990 22 concerts
1989 31 concerts
1988 31 concerts
1987 14 concerts
1986 11 concerts