Year	Number
1960	247978
1961	260704.99999999997
1962	274104
1963	288191
1964	303024
1965	318576
1966	334949
1967	352163
1968	370288
1969	390272
1970	416547
1971	444591
1972	474565
1973	502040
1974	516965.00000000006
1975	532332
1976	548179
1977	564452
1978	581232
1979	598510
1980	616327
1981	634623
1982	653489
1983	690785
1984	733173
1985	778035
1986	825710
1987	876306
1988	930078
1989	986988
1990	1047467.0000000001
1991	1111651
1992	1179865
1993	1208710
1994	1231714
1995	1255156
1996	1279077
1997	1303387
1998	1328193
1999	1353471
2000	1379266
2001	1405480
2002	1432229
2003	1440013
2004	1444905
2005	1449799
2006	1454718
2007	1459652
2008	1464611
2009	1469572
2010	1474557
2011	1479559
2012	1484585
2013	1489614
2014	1494660
2015	1499723
2016	1504803
2017	1509901
2018	1515016
2019	1521311
2020	1529920
2021	1541824
2022	1557740
2023	1578128