Year	Number
1960	48313780
1961	49588982
1962	50429275
1963	51058591
1964	51391588
1965	51488543
1966	51474393
1967	51487951
1968	51435436
1969	51252289
1970	50920387
1971	50586458
1972	50340734
1973	50130171
1974	49980782
1975	49887982
1976	49895689
1977	49983456
1978	50089371
1979	50322074
1980	50748724
1981	51287395
1982	51868521
1983	52464812
1984	53153541
1985	53879682
1986	54565737
1987	55198664
1988	55745935
1989	56050414
1990	56095027
1991	55999267
1992	55731996
1993	55339124
1994	54814456
1995	54148549
1996	53394893
1997	52495168
1998	51369046
1999	50070874
2000	48716733
2001	47303290
2002	45854070
2003	44600669
2004	43598233
2005	42742867
2006	42058473
2007	41565759
2008	41416845
2009	41477063
2010	41617372
2011	41851935
2012	42195965
2013	42653904
2014	43186575
2015	43781326
2016	44377692
2017	44918783
2018	45378034
2019	45755236
2020	45993826
2021	46168173
2022	45766205
2023	45551077