Year	Number
1960	151842
1961	151810
1962	150964
1963	149903
1964	149672
1965	151446
1966	152764
1967	152363
1968	151819
1969	151193
1970	151428
1971	152583
1972	153130
1973	153173
1974	153947
1975	156375
1976	159674
1977	162147
1978	163605
1979	164628
1980	165863
1981	167321
1982	167818
1983	167604
1984	168669
1985	169860
1986	170744
1987	172097
1988	173289
1989	174036
1990	174313
1991	174563
1992	175020
1993	175304
1994	175662
1995	176419
1996	177401
1997	178673
1998	180023
1999	181165
2000	182955
2001	185740
2002	188701
2003	191995
2004	196347
2005	200366
2006	203960
2007	209192
2008	216490
2009	225145
2010	234528
2011	244933
2012	256068
2013	267560
2014	277374
2015	286338
2016	296565
2017	306953
2018	318219
2019	330253
2020	341417
2021	351966
2022	366325
2023	385000