Year	US Dollars
1994	-1631200000
1995	-1879100000
1996	-1951700000
1997	-2095900000
1998	-2151200000
1999	-2611900000
2000	-2010400000
2001	-2080300000
2002	-1755800000
2003	-2001300000
2004	-2540600000
2005	-2850600000
2006	-2947100000
2007	-3217800000
2008	-3480300000
2009	-3809900000
2010	-3897000000
2011	-3923800000
2012	-4428800000
2013	-4732200000
2014	-5036600000
2015	-5199500000
2016	-5245700000
2017	-5374000000