Year	Number of
2000	53000
2001	51000
2002	51000
2003	48000
2004	44000
2005	46000
2006	50000
2007	46000
2008	46000
2009	52000
2010	54000
2011	59000
2012	63000
2013	64000
2014	65000
2015	67000
2016	65000
2017	57000
2018	54000
2019	52000
2020	50000