Gregory has seen concerts during 26 years.

Year   Concerts Seen  
2022 77 concerts
2021 33 concerts
2020 23 concerts
2019 47 concerts
2018 37 concerts
2017 80 concerts
2016 28 concerts
2015 27 concerts
2014 13 concerts
2013 44 concerts
2012 48 concerts
2011 4 concerts
2010 15 concerts
2009 25 concerts
2008 20 concerts
2007 42 concerts
2006 19 concerts
2005 12 concerts
2004 1 concert
2002 5 concerts
2001 3 concerts
2000 2 concerts
1999 2 concerts
1998 2 concerts
1996 2 concerts
1995 1 concert