Year	Number
1960	2166618
1961	2247637
1962	2331866
1963	2419321
1964	2510260
1965	2604427
1966	2702347
1967	2804033
1968	2909783
1969	3019309
1970	3133219
1971	3255332
1972	3382631
1973	3514800
1974	3652607
1975	3796117
1976	3945794
1977	4101276
1978	4263475
1979	4432432
1980	4512305
1981	4566638
1982	4621863
1983	4677920
1984	4734904
1985	4792590
1986	4851234
1987	4910769
1988	4971299
1989	5063833
1990	5254301
1991	5452225
1992	5658200
1993	5871678
1994	6093863
1995	6324818
1996	6565243
1997	6814508
1998	7074025
1999	7349474
2000	7654240
2001	7971503
2002	8303174.999999999
2003	8649481
2004	9011620
2005	9388791
2006	9783282
2007	10195380
2008	10626535
2009	11075811
2010	11545291
2011	12035947
2012	12548801
2013	13084925
2014	13645449
2015	14231560
2016	14844510
2017	15485610
2018	16156245
2019	16735580.999999998
2020	17323521
2021	17913613
2022	18501352
2023	19083031