Year	US Dollars
2002	-894000000
2003	-1023000000
2004	-939000000
2005	-887000000
2006	-1073000000
2007	-1484000000
2008	-1700000000
2009	-1801000000
2010	-1873000000
2011	-2021000000
2012	-2033000000
2013	-2153000000
2014	-2236000000
2015	-2008000000
2016	-1840000000