Year	Number
1960	4610712
1961	4751534
1962	4894995
1963	5045245
1964	5202846
1965	5368451
1966	5542003
1967	5723306
1968	5912715
1969	6111364
1970	6319199
1971	6538526
1972	6768544
1973	7003114
1974	7244901
1975	7497126
1976	7758673
1977	8029313
1978	8310217
1979	8600747
1980	8898954
1981	9203635
1982	9510754
1983	9835461
1984	10183138
1985	10540926
1986	10907619
1987	11281107
1988	11657772
1989	12034097
1990	12408996
1991	12782281
1992	13156406
1993	13537060
1994	13922626
1995	14313450
1996	14708879
1997	15103996
1998	15500542
1999	15901201
2000	16307654
2001	16727948
2002	17164021
2003	17611356
2004	18084007
2005	18583557
2006	19432009
2007	20703005
2008	21474059
2009	21827220
2010	22337563
2011	22730733
2012	22605577
2013	21495821
2014	20072232
2015	19205178
2016	18964252
2017	18983373
2018	19333463
2019	20098251
2020	20772595
2021	21324367
2022	22125249
2023	23227014