Year Number 1995 107000 1996 120000 1997 132000 1998 143000 1999 154000 2000 163000 2001 161000 2002 162000 2003 161000 2004 180000 2005 183000 2006 186000 2007 213000 2008 226000 2009 196000 2010 212000 2011 219000 2012 237000 2013 228000 2014 223000 2015 242000 2016 260000 2017 283000 2018 296000 2019 320000 2020 65000