Year	Number
1960	169565
1961	168802
1962	168088
1963	167469
1964	166892
1965	165768
1966	164053
1967	162234
1968	160396
1969	158576
1970	157717
1971	157659
1972	157382
1973	157044
1974	156623
1975	157405
1976	157795
1977	158006
1978	159286
1979	160550
1980	161920
1981	162773
1982	165894
1983	167849
1984	167584
1985	170404
1986	173181
1987	174273
1988	175631
1989	177284
1990	178990
1991	183843
1992	185683
1993	187501
1994	189169
1995	190337
1996	191491
1997	192857
1998	194013
1999	195067
2000	196289
2001	197793
2002	199287
2003	200646
2004	202059
2005	203432
2006	204278
2007	205066
2008	206399
2009	207859
2010	208618
2011	209074
2012	210374
2013	212608
2014	216022
2015	220217
2016	224158
2017	229157
2018	236050
2019	244207
2020	248434
2021	248831
2022	254244
2023	264733