Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1995	8500
1996	7200
1997	8900
1998	10000
1999	12000
2000	15000
2001	150000
2002	560000
2003	1246225
2004	1990722
2005	2746094
2006	4415470
2007	6592000
2008	9937622
2009	9458557
2010	11820348
2011	15644877
2012	20092678
2013	28231900
2014	37102958
2015	37752782
2016	28889317
2017	35375246
2018	36470600
2019	37123208
2020	40798396
2021	46885799
2022	49844134