Year	Number
1990	8667632
1991	8462415
1992	8207313
1993	8031838
1994	7901826
1995	7732770
1996	7560053
1997	7372347
1998	7182159
1999	6991502
2000	6829839
2001	6659434
2002	6461956
2003	6245866
2004	6064369
2005	5866248
2006	5687561
2007	5530213
2008	5397453
2009	5246549
2010	5110674
2011	4963551
2012	4838180
2013	4702987
2014	4557122
2015	4419652
2016	4301304
2017	4181309
2018	4061493
2019	3943158
2020	3825843
2021	3722691
2022	3633376