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
1992	0
1993	643
1994	1920
1995	2766
1996	7260
1997	8492
1998	8516
1999	11389
2000	13397
2001	22671
2002	47982
2003	66517
2004	92452
2005	128700
2006	214214
2007	247641
2008	367388
2009	502005
2010	594000
2011	1243619
2012	3729617
2013	6832380
2014	29029342
2015	40993717
2016	50586416
2017	47946665
2018	61143964
2019	81945491
2020	78548329
2021	67930093
2022	57807409