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	267
1993	1242
1994	4512
1995	14795
1996	50973
1997	165337
1998	267615
1999	332000
2000	524000
2001	1017999
2002	1645568
2003	2102207
2004	3051160
2005	4353447
2006	4718215
2007	4912077
2008	5022638
2009	4961499
2010	4890979
2011	4938000
2012	4997265
2013	4565976
2014	4267592
2015	4184053
2016	4204692
2017	4361329
2018	3764670
2019	3704258
2020	3671995
2021	3726653
2022	3826338