John Keel has seen concerts during 33 years.

Year   Concerts Seen  
2018 1 concert
2017 1 concert
2016 1 concert
2015 2 concerts
2014 1 concert
2013 2 concerts
2012 3 concerts
2011 4 concerts
2010 1 concert
2009 1 concert
2008 3 concerts
2007 2 concerts
2006 1 concert
2005 4 concerts
2003 8 concerts
2002 1 concert
2000 1 concert
1999 2 concerts
1998 2 concerts
1995 1 concert
1994 1 concert
1993 4 concerts
1992 3 concerts
1991 1 concert
1989 2 concerts
1987 3 concerts
1986 1 concert
1981 1 concert
1980 2 concerts
1978 9 concerts
1977 5 concerts
1976 4 concerts
1975 4 concerts