Year Personnel 1985 1000 1989 1000 1990 1000 1991 1000 1992 1000 1993 1000 1994 1000 1995 1800 1996 1800 1997 1800 1998 1800 1999 1800 2000 1800 2001 1600 2002 2000 2003 2000 2005 2000 2007 2000 2008 2000 2009 2000 2010 2000 2011 2500 2012 2500 2013 2500 2014 2500 2015 2550 2016 2550 2017 3000 2018 3000 2019 3000 2020 3000