David Bollinger has seen concerts during 29 years.

Year   Concerts Seen  
1993 2 concerts
1992 4 concerts
1991 2 concerts
1990 5 concerts
1989 3 concerts
1988 2 concerts
1987 2 concerts
1986 4 concerts
1985 4 concerts
1984 2 concerts
1983 1 concert
1982 3 concerts
1981 1 concert
1980 4 concerts
1979 1 concert
1978 4 concerts
1977 4 concerts
1976 4 concerts
1975 5 concerts
1974 6 concerts
1973 2 concerts
1972 1 concert
1971 4 concerts
1970 2 concerts
1969 3 concerts
1967 1 concert
1965 1 concert
1961 1 concert
1960 3 concerts