Year	Total
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	0
1993	0
1994	0
1995	0
1996	102
1997	320
1998	420
1999	625
2000	1160
2001	1630
2002	13200
2003	47617
2004	135000
2005	265000
2006	2150000
2007	2132770
2008	3673520
2009	4900000
2010	5940842
2011	6324000
2012	6528000
2013	7537100
2014	7999100
2015	8489000
2016	9400000