Year	Number
1960	218113
1961	238254
1962	254767
1963	268815
1964	283660
1965	299279
1966	315782
1967	333035
1968	350409
1969	368638
1970	387843
1971	408048
1972	429336
1973	451672
1974	475202
1975	499958
1976	526041
1977	553407
1978	582238
1979	612571
1980	635702
1981	654531
1982	673945
1983	693936
1984	714547
1985	735712
1986	757534
1987	780004
1988	803172
1989	826962
1990	851491
1991	876747
1992	902789
1993	929529
1994	957100
1995	974262
1996	982717
1997	991222
1998	999812
1999	1008476
2000	1017228
2001	1026031
2002	1034923
2003	1043892
2004	1052951
2005	1094320
2006	1149064
2007	1206547
2008	1266991
2009	1330284
2010	1396832
2011	1466710
2012	1540187
2013	1617128
2014	1698026
2015	1782971
2016	1872292
2017	1966088
2018	2064581.9999999998
2019	2108509
2020	2148293
2021	2182151
2022	2209584
2023	2232240