Robert Geisler has seen concerts during 17 years.

Year   Concerts Seen  
2016 2 concerts
2013 1 concert
2010 2 concerts
2004 1 concert
2003 2 concerts
1993 1 concert
1992 1 concert
1989 2 concerts
1988 5 concerts
1987 4 concerts
1985 3 concerts
1984 1 concert
1983 2 concerts
1982 2 concerts
1981 3 concerts
1979 2 concerts
1978 4 concerts