Year	US Dollars
1970	0
1971	0
1972	0
1973	0
1974	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	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	879823000
2007	1299340000
2008	1502101000
2009	2356696000
2010	1603308000
2011	2357310000
2012	2833621000
2013	3061042000
2014	2634396000
2015	2659804000
2016	2707121000