David Koerner 27 has seen concerts during 15 years.

Year   Concerts Seen  
2023 1 concert
1999 1 concert
1995 1 concert
1990 1 concert
1988 2 concerts
1984 3 concerts
1983 2 concerts
1982 3 concerts
1981 3 concerts
1980 4 concerts
1979 7 concerts
1978 6 concerts
1977 2 concerts
1976 3 concerts
1975 2 concerts