Year	Number
1987	2227375
1988	2301271
1989	2477239
1994	3435616
1995	3432561
1996	3348662
1998	3283751
1999	3343652
2000	3271945
2001	3159893
2002	3145149
2003	3205722
2004	3161902
2005	2548274
2006	2312651
2007	1975586
2008	1589566
2009	1696471
2010	1880438
2011	1622712
2012	1595595
2014	1193016
2015	1291133
2021	1995326
2022	1954473