Year	Number
1960	1755920
1961	1845658
1962	1946579
1963	2053036.9999999998
1964	2165476
1965	2283738
1966	2408636
1967	2540364
1968	2679493
1969	2825827
1970	2980371
1971	3143367
1972	3311451
1973	3434706
1974	3562728
1975	3695522
1976	3833458
1977	3976143
1978	4124345.9999999995
1979	4278073
1980	4437754
1981	4602931
1982	4727282
1983	4853494
1984	4983256
1985	5116117
1986	5252710
1987	5392950
1988	5537135
1989	5684762
1990	5836537
1991	5992365
1992	6152576
1993	6316612
1994	6448579
1995	6582251
1996	6718884
1997	6857966
1998	7000124
1999	7145230
2000	7293549
2001	7444526
2002	7598844
2003	7756360
2004	7917365
2005	8081255
2006	8248771.000000001
2007	8419760
2008	8585977
2009	8751162
2010	8919759
2011	9091604
2012	9267004
2013	9445291
2014	9627261
2015	9812737
2016	10002049
2017	10194477
2018	10390607
2019	10554712
2020	10719188
2021	10882757
2022	11044607
2023	11204382