Year	Number
1960	6995828
1961	7165275
1962	7345808
1963	7535042
1964	7736700
1965	7960009
1966	8201524
1967	8455642
1968	8724850
1969	9010299
1970	9316339
1971	9639319
1972	9979315
1973	10339489
1974	10712834
1975	11096073
1976	11485736
1977	11894042
1978	12324432
1979	12765265
1980	13221836
1981	13690008
1982	14167193
1983	14661189
1984	15164998
1985	15670564
1986	16172929
1987	16671880
1988	17167543
1989	17644169
1990	18114936
1991	18558922
1992	18960631
1993	19336552
1994	19685372
1995	20015341
1996	20333196
1997	20651765
1998	20966331
1999	21264568
2000	21565368
2001	21875917
2002	22170763
2003	22440962
2004	22689996
2005	22926205
2006	23165641
2007	23410447
2008	23643443
2009	23857963
2010	24059555
2011	24252684
2012	24423359
2013	24548523
2014	24624537
2015	24665087
2016	24690513
2017	24695234
2018	24661542
2019	24598507
2020	24524081
2021	24432211
2022	24321159
2023	24201985