Year	Number
1970	9703748
1971	10006069
1972	10672379
1973	11173497
1974	11636058
1975	12109564
1976	12550573
1977	12823035
1978	13007016
1979	13332113
1980	13813177
1981	14270007
1982	14734175
1983	15171837
1984	15492554
1985	15668802
1986	15937002
1987	16102934
1988	16468960
1989	17036002
1990	17203606
1991	17442876
1992	17682912
1993	18032264
1994	18305802
1995	18574086
1996	18841872
1997	19126866
1998	19307868
1999	19583034
2000	19720780
2001	19933150
2002	19990416
2003	20692268
2004	21341016
2005	21545788
2006	21766718
2007	22212462
2008	22367312
2009	22716970
2010	23118536
2011	23460684
2012	23759800
2013	24673040
2014	25018260
2015	25496502
2016	26151696
2017	26101730
2018	26240260
2019	26840638
2020	27287818
2021	27731760
2022	27831452