Year Personnel 1992 28000 1993 28000 1994 15000 1995 11000 1996 18000 1997 18000 1998 19000 1999 19000 2000 14500 2001 17500 2002 17500 2003 29000 2004 26000 2005 26000 2006 22000 2007 22000 2008 22000 2009 22000 2010 22000 2011 22000 2012 22000 2013 22000 2014 36500 2015 36500 2016 41500 2017 42000 2018 41500 2019 42000 2020 57000