Year Personnel 1985 20000 1989 40000 1990 60000 1991 60000 1992 70000 1993 70000 1994 60000 1995 51500 1996 51500 1997 46500 1998 41500 1999 41500 2000 50600 2001 56800 2002 56800 2003 61800 2004 55000 2005 47000 2007 47000 2008 47000 2009 46800 2010 46800 2011 46800 2012 46800 2013 46800 2014 46800 2015 46400 2016 46400 2017 46000 2018 46000 2019 46000 2020 46000