Year	Number
1960	10000
1961	10000
1962	10000
1963	10000
1964	10000
1965	20000
1966	20000
1967	20000
1968	20000
1969	20000
1970	40000
1971	40000
1972	40000
1973	40000
1974	40000
1975	81000
1976	90800
1977	106200
1978	123100
1979	133600
1980	157400
1981	170600
1982	188559
1983	194855
1984	202459
1985	209930
1986	214706
1987	240444
1988	256521
1989	272000
1990	281433
1991	304863
1992	326789
1993	364119
1994	430000
1995	478939
1996	525682
1997	684636
1998	742415
1999	802597
2000	898734
2001	944950
2002	1037986
2003	1159223
2004	1343193
2005	1388503
2006	1329505
2007	1436695
2008	1437733
2009	1499601
2010	1060384
2011	1031719
2012	995089
2013	968459
2014	881217
2015	859514
2016	838346
2017	813641
2018	767835
2019	640302
2020	559882
2021	503455
2022	491613