Year Personnel 1993 33000 1994 47000 1995 51000 1996 46600 1997 45150 1998 48050 1999 47480 2000 41200 2001 37700 2002 30900 2003 22000 2004 20000 2005 20000 2006 17000 2007 17000 2008 17000 2009 16531 2010 15799 2011 15850 2012 15850 2013 15850 2014 15850 2015 15850 2016 15850 2017 16000 2018 15850 2019 16000 2020 18000