Year	Number
1999	13859
2000	22448
2001	15640
2002	16795
2003	15754
2004	16649
2005	17332
2006	19352
2007	25153
2008	30228
2009	33657
2010	31432
2011	34172
2012	36300
2013	39732
2014	44246
2017	56307
2018	50186
2019	37445
2020	11415
2021	1326