Bob! has seen concerts during 16 years.

Year   Concerts Seen  
2018 2 concerts
2016 5 concerts
2013 3 concerts
2012 3 concerts
2011 2 concerts
2009 3 concerts
2008 2 concerts
1999 1 concert
1992 2 concerts
1983 1 concert
1982 4 concerts
1981 1 concert
1980 4 concerts
1979 6 concerts
1978 7 concerts
1977 5 concerts