Year Personnel 1985 142000 1989 191000 1990 190000 1991 190000 1992 181000 1993 181000 1994 185000 1995 178100 1996 181100 1997 181050 1998 181050 1999 179550 2000 180500 2001 171500 2002 169500 2003 175000 2004 176000 2005 176000 2006 185000 2007 185000 2008 185000 2009 184550 2010 184550 2011 184550 2012 184500 2013 184500 2014 184500 2015 184500 2016 184500 2017 178000 2018 177500 2019 178000 2020 178000