Year	Number
1960	3874894
1961	3959755
1962	4052010
1963	4146594
1964	4244092
1965	4343702
1966	4443951
1967	4546419
1968	4654959
1969	4769017
1970	4886790
1971	5007751
1972	5132473
1973	5265762
1974	5407914
1975	5556318
1976	5716101
1977	5883519
1978	6062967
1979	6254511
1980	6431065
1981	6607071
1982	6801063
1983	6988124
1984	7177316
1985	7386990
1986	7601637
1987	7825727
1988	8050791
1989	8273676
1990	8506874
1991	8741476
1992	8981269
1993	9228456
1994	9467350
1995	9710661
1996	9972761
1997	10232740
1998	10485058
1999	10746402
2000	11023143
2001	11309806
2002	11605556
2003	11906867
2004	12215768
2005	12536879
2006	12869789
2007	13215299
2008	13571378
2009	13946762
2010	14355871
2011	14794179
2012	15251048
2013	15717002
2014	16189236
2015	16696763
2016	17253240
2017	17843940
2018	18468470
2019	19119252
2020	19736267
2021	20262257
2022	20769025
2023	21370344