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	2645
1991	8477
1992	23292
1993	45712
1994	143000
1995	265000
1996	473100
1997	705786
1998	1070154
1999	1628153
2000	3076279
2001	4967430
2002	6886111
2003	7944586
2004	8727188
2005	9320000
2006	9965720
2007	11029930
2008	12224163
2009	11792475
2010	12011823
2011	11689937
2012	11579425
2013	11590326
2014	11726491
2015	9900582
2016	9952001
2017	9945037
2018	10041939
2019	10272694
2020	10332660
2021	10382460
2022	10371597