Year Personnel 1985 8700 1989 15000 1990 9000 1991 9000 1992 10000 1993 10000 1994 10000 1995 16700 1996 15000 1997 15000 1998 15000 1999 15000 2000 15000 2001 12000 2002 12000 2003 12000 2004 12000 2005 12000 2007 12000 2008 12000 2009 12000 2010 12000 2011 12000 2012 12000 2013 12000 2014 12000 2015 12000 2016 12000 2017 12000 2018 12000 2019 0 2020 12000