Year Personnel 1985 21100 1989 21000 1990 21000 1991 21000 1992 21000 1993 21000 1994 21000 1995 28500 1996 28500 1997 28500 1998 28500 1999 28500 2000 28500 2001 21600 2002 21600 2003 21600 2004 21000 2005 22000 2007 22000 2008 22000 2009 21600 2010 21600 2011 21600 2012 21600 2013 21600 2014 21600 2015 21600 2016 21600 2017 22000 2018 21500 2019 22000 2020 22000