Efren Montenegro has seen concerts during 34 years.

Year   Concerts Seen  
2024 1 concert
2023 10 concerts
2022 10 concerts
2021 1 concert
2020 1 concert
2019 4 concerts
2018 9 concerts
2017 2 concerts
2016 1 concert
2015 1 concert
2014 1 concert
2013 1 concert
2012 3 concerts
2011 1 concert
2009 1 concert
2008 2 concerts
2007 2 concerts
2006 3 concerts
2004 2 concerts
2003 1 concert
2002 1 concert
2001 2 concerts
2000 1 concert
1999 2 concerts
1997 2 concerts
1996 1 concert
1995 1 concert
1994 1 concert
1993 1 concert
1992 2 concerts
1991 1 concert
1990 1 concert
1988 1 concert
1987 1 concert