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	486
1992	796
1993	1560
1994	2967
1995	4614
1996	6283
1997	8013
1998	12000
1999	20309
2000	28467
2001	53111
2002	97193
2003	140000
2004	200138
2005	206190
2006	237119
2007	257596
2008	288662
2009	337061
2010	350061
2011	347917
2012	349296
2013	307708
2014	305456
2015	334792
2016	332208
2017	329565
2018	329326
2019	329326
2020	295000
2021	316633
2022	323482