Year	Number
1999	487144
2000	461251
2001	446136
2002	434365
2003	420720
2004	410101
2005	406224
2006	400044
2007	394783
2008	389271
2009	384367
2010	372412
2011	358466
2012	351074
2013	345192
2014	344846
2015	355910
2016	354520
2017	350855
2018	348468