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	900
1997	2000
1998	9032
1999	34562
2000	154600
2001	195000
2002	216000
2003	319000
2004	428695
2005	557207
2006	774900
2007	1194583
2008	1763178
2009	2249023
2010	2510470
2011	2942313
2012	3375205
2013	2877584
2014	3027243
2015	3068156
2016	3367573
2017	3886167
2018	4222041
2019	4418919
2020	4363919
2021	4687304
2022	4835520