Year	Number
1960	13792
1961	15364
1962	17118
1963	19072
1964	21253
1965	23675
1966	26378
1967	29390
1968	32750
1969	36483
1970	40648
1971	45288
1972	50465
1973	56218
1974	62636
1975	69786
1976	77765
1977	86629
1978	96519
1979	107537
1980	119832
1981	133492
1982	148731
1983	165710
1984	184655
1985	205704
1986	229187
1987	255351
1988	284544
1989	316980
1990	353166
1991	393483
1992	438468
1993	488451
1994	515539
1995	523284
1996	531156
1997	539125
1998	547224
1999	555445
2000	563802
2001	572260
2002	580857
2003	589584
2004	603489
2005	621669
2006	640423
2007	659743
2008	679674
2009	700149
2010	721270
2011	774615
2012	860772
2013	956235
2014	1062439
2015	1180439
2016	1311734
2017	1377500
2018	1446563
2019	1501635
2020	1549729
2021	1589865
2022	1622620
2023	1650319