Year Number 2000 444000 2001 437000 2002 422000 2003 409000 2004 403000 2005 393000 2006 375000 2007 372000 2008 369000 2009 362000 2010 350000 2011 341000 2012 331000 2013 326000 2014 318000 2015 311000 2016 306000 2017 302000 2018 298000 2019 294000 2020 284000