Year	Number
1966	534985
1967	534985
1968	534985
1969	534985
1970	895016
1971	904692
1972	904692
1973	904692
1974	904692
1975	1105339
1976	1188602
1977	1352015
1978	1526373
1979	1779248
1981	2847188
1982	3630129
1983	4043409
1984	4442616
1985	5059805
1986	5572491
1987	6009086
1988	6453138
1989	6994746
1990	7657211
1991	8368752
1992	9242273
1993	9996852
1994	10836857
1995	11808488
1996	12947085
1997	14241082
1998	15966721
1999	18060810
2000	19847314
2001	21794616
2002	24432434
2003	26632510
2004	28491074
2005	29926698
2006	31302896
2007	33558368
2008	34962355
2009	34636504
2010	35030763
2011	34952262
2012	34844459
2013	32979245
2014	26499652
2015	30118416
2016	31758701
2017	33369277
2018	32595146
2019	37116422
2020	39006543
2021	40713027
2022	37446588