Year	Number
1960	50720764
1961	50536773
1962	50348488
1963	50171639
1964	50000758
1965	49742764
1966	49510175
1967	49426266
1968	49295856
1969	49091160
1970	48793751
1971	48396177
1972	48024446
1973	47658493
1974	47314974
1975	47012972
1976	46707268
1977	46339977
1978	45887515
1979	45447656
1980	45060451
1981	44818701
1982	44644943
1983	44450473
1984	44239869
1985	44012261
1986	43785677
1987	43556426
1988	43287672
1989	43009719
1990	42755874
1991	42416617
1992	42179934
1993	42184309
1994	42207856
1995	42177731
1996	42110439
1997	42058345
1998	42019601
1999	41982938
2000	41778237
2001	41454011
2002	41119861
2003	40941382
2004	40780148
2005	40611197
2006	40443275
2007	40210586
2008	39979949
2009	39838803
2010	39652932
2011	39519532
2012	39410425
2013	39310807
2014	39210929
2015	39092740
2016	38947818
2017	38785967
2018	38622475
2019	38462796
2020	38254752
2021	37837252
2022	37200482
2023	37023206