Year	Number
1960	50217616
1961	51577328
1962	52489015
1963	53179803
1964	53559045
1965	53668621
1966	53631315
1967	53623040
1968	53575270
1969	53396737
1970	53075570
1971	52799429
1972	52628954
1973	52455682
1974	52285944
1975	52129971
1976	52038866
1977	52023406
1978	52051149
1979	52262769
1980	52724452
1981	53300785
1982	53921851
1983	54558104
1984	55258446
1985	55955779
1986	56592779
1987	57169602
1988	57645687
1989	57931666
1990	58023174
1991	57967171
1992	57730342
1993	57369710
1994	56864079
1995	56207836
1996	55467795
1997	54562374
1998	53406455
1999	52083245
2000	50724914
2001	49313583
2002	47862649
2003	46623387
2004	45635772
2005	44775951
2006	44099306
2007	43638829
2008	43533527
2009	43638386
2010	43824875
2011	44110627
2012	44510775
2013	45025478
2014	45615189
2015	46266054
2016	46914971
2017	47505317
2018	48010588
2019	48428784
2020	48700354
2021	48902462
2022	48493701
2023	48284338