Jeff Knight has seen concerts during 17 years.

Year   Concerts Seen  
2013 1 concert
2011 2 concerts
2008 1 concert
2003 1 concert
1990 3 concerts
1989 3 concerts
1988 1 concert
1987 2 concerts
1986 3 concerts
1985 1 concert
1984 2 concerts
1983 2 concerts
1981 2 concerts
1980 1 concert
1979 2 concerts
1978 2 concerts
1977 4 concerts