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	0
1997	0
1998	0
1999	0
2000	15300
2001	110463
2002	247238
2003	350954
2004	522400
2005	745615
2006	1060122
2007	1413967
2008	2091992
2009	2182249
2010	2776050
2011	3314767
2012	4025478
2013	3988195
2014	3753330
2015	3644483
2016	3614172
2017	4074157
2018	4566502
2019	4710800
2020	5808909
2021	6512361
2022	5357540