Year Personnel 1985 62900 1989 65000 1990 28000 1991 20000 1992 15000 1993 15000 1994 14000 1995 12000 1996 17000 1997 17000 1998 17000 1999 16000 2000 16000 2001 16000 2002 14000 2003 14000 2004 14000 2005 14000 2006 14000 2007 14000 2008 12000 2009 12000 2010 12000 2011 12000 2012 12000 2013 12000 2014 12000 2015 12000 2016 12000 2017 12000 2018 12000 2019 12000 2020 12000