Year	Number
1960	224188
1961	228708
1962	233190
1963	237284
1964	241115
1965	244757
1966	248249
1967	252111
1968	256530
1969	261119
1970	266535
1971	271859
1972	276635
1973	281763
1974	286863
1975	291700
1976	296208
1977	301229
1978	306261
1979	309935
1980	312311
1981	313908
1982	315495
1983	317325
1984	318904
1985	321563
1986	325523
1987	328215
1988	329707
1989	330987
1990	331618
1991	331919
1992	332081
1993	331607
1994	330667
1995	329955
1996	329552
1997	329158
1998	329161
1999	329713
2000	331110
2001	333391
2002	336339
2003	340074
2004	344774
2005	350606
2006	357350
2007	366571
2008	378815
2009	392870
2010	409008
2011	426686
2012	444005
2013	459351
2014	472951
2015	486323
2016	499107
2017	510407
2018	520664
2019	529884
2020	538600
2021	547342
2022	558008
2023	569053