Year Personnel 1985 62700 1989 47000 1990 47000 1995 225000 1996 225000 1997 225000 1998 225000 1999 50000 2000 50000 2009 2000 2010 2000 2011 3200 2012 20000 2013 11000 2014 17000 2015 19800 2016 19800 2017 20000 2018 19800 2019 20000 2020 14000