Year Personnel 1985 16200 1989 17000 1990 16000 1991 16000 1992 16000 1993 16000 1994 16000 1995 23000 1996 23000 1997 23000 1998 23000 1999 23000 2000 23000 2001 23000 2002 23000 2003 19500 2004 16000 2005 16000 2006 16000 2007 16000 2008 16000 2009 16500 2010 16500 2011 16500 2012 16500 2013 16500 2014 16500 2015 16500 2016 16500 2017 16000 2018 16100 2019 16000 2020 16000