Year	Number
1992	32572
1993	44809
1994	48705
1995	46433
1996	49914
1997	56267
1998	55336
1999	63240
2000	84277
2001	96428
2002	98073
2003	98867
2004	116713
2005	130790
2006	148820
2007	156614
2008	158463
2009	143236
2010	166648
2011	197424
2012	191506
2013	190660
2014	186923
2015	191035
2016	205308
2017	221160