Year	Number
1960	21299284
1961	22044274
1962	22854463
1963	23727999
1964	24659336
1965	25590091
1966	26508919
1967	27456617
1968	28419566
1969	29383752
1970	30235123
1971	30784363
1972	31422439
1973	32324506
1974	33187792
1975	33933344
1976	34578955
1977	35285256
1978	36074232
1979	36913835
1980	37839239
1981	38857039
1982	39917426
1983	40955839
1984	41929446
1985	42816899
1986	43588887
1987	44236575
1988	44819364
1989	45392957
1990	45958069
1991	46359538
1992	46654033
1993	46961558
1994	47238706
1995	47449452
1996	47566600
1997	47679889
1998	47834435
1999	48009362
2000	48200365
2001	48483067
2002	48829061
2003	49150927
2004	49424493
2005	49613868
2006	49723388
2007	49792760
2008	49798436
2009	49703118
2010	49535964
2011	49300535
2012	48966075
2013	48568871
2014	48143480
2015	47666620
2016	47168634
2017	46647833
2018	46111201
2019	45611014
2020	45173820
2021	44799782
2022	44455660
2023	44152676