Year	Number
1990	5565
1991	6029
1992	5381
1993	5284
1994	5183
1995	5089
1996	5008
1997	4951
1998	4891
1999	4834
2000	4802
2001	4776
2002	4751
2003	4747
2004	4756
2005	4777
2006	4803
2007	4828
2008	4827
2009	4783
2010	4738
2011	4728
2012	4740
2013	5357
2014	4746
2015	4734
2016	4741
2017	4763
2018	4775
2019	4776
2020	4772
2021	4770
2022	4759