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	300
1997	5000
1998	7831
1999	8161
2000	17486
2001	25504
2002	71349
2003	114379
2004	203309
2005	318044
2006	1259762
2007	1876411
2008	1442000
2009	2191500
2010	3865354
2011	3211215
2012	3322837
2013	3346275
2014	3459137
2015	3464490
2016	3434567
2017	3488524
2018	3579257
2019	3618747
2020	3488797
2021	3599278
2022	3760695