Year	Number
1960	47283873
1961	47676149
1962	48041545
1963	48436887
1964	48857715
1965	49202597
1966	49542143
1967	49986920
1968	50406350
1969	50768203
1970	51035391
1971	51290509
1972	51656511
1973	52039054
1974	52456829
1975	52922189
1976	53389856
1977	53817906
1978	54178321
1979	54492822
1980	54794696
1981	55097607
1982	55407594
1983	55699987
1984	55981030
1985	56243041
1986	56498923
1987	56749148
1988	56963966
1989	57042030
1990	57031966
1991	56915906
1992	56760212
1993	56752802
1994	56770720
1995	56721318
1996	56630040
1997	56554776
1998	56491692
1999	56433431
2000	56124654
2001	55716493
2002	55366555
2003	55196253
2004	55044141
2005	54890704
2006	54748712
2007	54545043
2008	54346886
2009	54232892
2010	54023740
2011	53881381
2012	53744949
2013	53620480
2014	53496159
2015	53355228
2016	53199616
2017	53049259
2018	52923890
2019	52831512
2020	52711617
2021	52324691
2022	51610920
2023	51596563