Greichter has seen concerts during 15 years.

Year   Concerts Seen  
2023 3 concerts
2022 2 concerts
2019 5 concerts
2018 4 concerts
2017 6 concerts
2016 5 concerts
2015 13 concerts
2014 5 concerts
2013 8 concerts
2012 2 concerts
2011 7 concerts
2010 5 concerts
2009 3 concerts
2008 1 concert
2005 1 concert