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	2911
1988	3527
1989	4955
1990	7766
1991	13482
1992	17897
1993	27278
1994	44059
1995	200747
1996	359511
1997	845233
1998	1278498
1999	2275258
2000	6110957
2001	12351259
2002	17235061
2003	24446759
2004	38549390
2005	67378454
2006	104969989
2007	151525888
2008	189313083
2009	234064131
2010	269787686
2011	298146900
2012	323653857
2013	349058638
2014	357504633
2015	364079454
2016	370192930
2017	382752146
2018	376049984
2019	418592550
2020	429521990
2021	456279631
2022	437226852