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	300
1986	1500
1987	3475
1988	6300
1989	13579
1990	25000
1991	32000
1992	44000
1993	61100
1994	88000
1995	158000
1996	288600
1997	545000
1998	946000
1999	1677000
2000	2461000
2001	2970000
2002	3000000
2003	3500000
2004	3860000
2005	4270000
2006	4690135
2007	4970719
2008	5048127
2009	4704497
2010	4701474
2011	4906352
2012	5013676
2013	4880792
2014	4912620
2015	4902009
2016	4875116
2017	4898872
2018	4971493
2019	5160309
2020	5234009
2021	5373865
2022	5690017