Year	Number
1960	81226
1961	83686
1962	86157
1963	88718
1964	91171
1965	93469
1966	95880
1967	98189
1968	100391
1969	102812
1970	105521
1971	108528
1972	111803
1973	115315
1974	119152
1975	123350
1976	127868
1977	132600
1978	137496
1979	142559
1980	147729
1981	152279
1982	156960
1983	162365
1984	167817
1985	174086
1986	180695
1987	186957
1988	193517
1989	199795
1990	205653
1991	211634
1992	217448
1993	222614
1994	225713
1995	227596
1996	229414
1997	229810
1998	229146
1999	228298
2000	227204
2001	225893
2002	224354
2003	222700
2004	220934
2005	219190
2006	217596
2007	216116
2008	214710
2009	213416
2010	212741
2011	212665
2012	212772
2013	212981
2014	213024
2015	212802
2016	212493
2017	212078
2018	211481
2019	210644
2020	210057
2021	209724
2022	209417
2023	209066