Year	Number
1990	6443
1991	6975
1992	7497
1993	8028
1994	8516
1995	9006
1996	9435
1997	9824
1998	10168
1999	10481
2000	10782
2001	11040
2002	11277
2003	11426
2004	11517
2005	11551
2006	11514
2007	11419
2008	11255
2009	11068
2010	10815
2011	10474
2012	10105
2013	9760
2014	9483
2015	9352
2016	9276
2017	9307
2018	9370
2019	9487
2020	9631
2021	9846
2022	10060