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	0
1994	0
1995	0
1996	2300
1997	3300
1998	5600
1999	11008
2000	29791
2001	392650
2002	851000
2003	1100000
2004	1259590
2005	1530244
2006	1909885
2007	2322436
2008	1859632
2009	2463741
2010	2692372
2011	3100000
2012	3500000
2013	3685983
2014	3359654
2015	3400955
2016	3369756
2017	3625699
2018	2714878
2019	2630076
2020	2618880
2021	2635466
2022	2782226