Year	US Dollars
2002	387000000
2003	344000000
2004	281000000
2005	182000000
2006	77000000
2007	48000000
2008	29000000
2009	-48000000
2010	-70000000
2011	-132000000
2012	-98000000
2013	-108000000
2014	-110000000
2015	-118000000
2016	21000000