Year	Number
1960	3437141
1961	3511705
1962	3591484
1963	3678670
1964	3776110
1965	3883359
1966	3999563
1967	4126531
1968	4262712
1969	4403156
1970	4541866
1971	4634884
1972	4732446
1973	4881989
1974	5036055
1975	5184279
1976	5337016
1977	5501304
1978	5674010
1979	5850092
1980	6011636
1981	6166029
1982	6332961
1983	6502792
1984	6669588
1985	6838436
1986	7007879
1987	7187287
1988	7354662
1989	7511787
1990	7677983
1991	7853252
1992	8040896
1993	8227066
1994	8402012
1995	8579542
1996	8771964
1997	8981015
1998	9215436
1999	9482304
2000	9760108
2001	10036307
2002	10327064
2003	10619238
2004	10904174
2005	11193040
2006	11486829
2007	11773818
2008	12064233
2009	12381056
2010	12726836
2011	13099525
2012	13484224
2013	13845724
2014	14203976
2015	14613265
2016	15079180
2017	15592576
2018	16156666
2019	16760238
2020	17321068
2021	17818026
2022	18332382
2023	18921482