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	14
1996	920
1997	2200
1998	7000
1999	18000
2000	139000
2001	225000
2002	338225
2003	475942
2004	787000
2005	1089800
2006	1358152
2007	1882830
2008	2423416
2009	2136409
2010	2550592
2011	3217261
2012	3584283
2013	3696834
2014	3738125
2015	3713137
2016	3788490
2017	3746644
2018	3636931
2019	3613846
2020	3420383
2021	3900179
2022	4170329