Year	Number
1960	200720
1961	203605
1962	206389
1963	209626
1964	214284
1965	220161
1966	227123
1967	235149
1968	243863
1969	252944
1970	262023
1971	271257
1972	280270
1973	288976
1974	297167
1975	303973
1976	309751
1977	314824
1978	318710
1979	319898
1980	318277
1981	314599
1982	309375
1983	304321
1984	300347
1985	298527
1986	300690
1987	306914
1988	314805
1989	324821
1990	336447
1991	350053
1992	367637
1993	387596
1994	406742
1995	423695
1996	437974
1997	448821
1998	455938
1999	460230
2000	464959
2001	471981
2002	478589
2003	483673
2004	486935
2005	486635
2006	482760
2007	475739
2008	465081
2009	452446
2010	440989
2011	434042
2012	434656
2013	442204
2014	453430
2015	465286
2016	476566
2017	487992
2018	500791
2019	514499
2020	523997
2021	528646
2022	536879
2023	551335