Year	Number
1990	3098
1991	3303
1992	3530
1993	3771
1994	4009
1995	4246
1996	4462
1997	4636
1998	4762
1999	4821
2000	4801
2001	4755
2002	4699
2003	4678
2004	4718
2005	4782
2006	4861
2007	4929
2008	4965
2009	4950
2010	4903
2011	4843
2012	4772
2013	4740
2014	4731
2015	4761
2016	4777
2017	4763
2018	4728
2019	4675
2020	4604
2021	4546
2022	4495