Year	Number
1990	4522
1991	4502
1992	4483
1993	4467
1994	4470
1995	4443
1996	4424
1997	4418
1998	4413
1999	4433
2000	4461
2001	4469
2002	4475
2003	4475
2004	4453
2005	4426
2006	4416
2007	4413
2008	4421
2009	4431
2010	4443
2011	4459
2012	4470
2013	4466
2014	4455
2015	4443
2016	4420
2017	4400
2018	4383
2019	4380
2020	4376
2021	4381
2022	4386