Year	Number
1960	2361196
1961	2554638
1962	2754346
1963	2969667
1964	3202152
1965	3452123
1966	3721992
1967	4056882
1968	4438705
1969	4855262
1970	5311569
1971	5629671
1972	5903885
1973	6190645
1974	6491759
1975	6807519
1976	7087439
1977	7360096
1978	7643642
1979	7938110
1980	8244352.000000001
1981	8483256
1982	8688305
1983	8898311
1984	9113693
1985	9333674
1986	9559279
1987	9790337
1988	10027310
1989	10269343
1990	10517565
1991	10553329
1992	10478067
1993	10403546
1994	10329454
1995	10255889
1996	10180302
1997	10104248
1998	10028660
1999	9953637
2000	9879073
2001	9849502
2002	9842731
2003	9835965
2004	9829194
2005	9822447
2006	9816737
2007	9811560
2008	9806379
2009	9801214
2010	9796045
2011	9808821
2012	9830787
2013	9852742
2014	9874776
2015	9896859
2016	9919022
2017	9941235
2018	9963497
2019	9962393
2020	9963452
2021	9967677
2022	9975709
2023	9988049