Year	current US$
2002	387000000
2003	344000000
2004	281000000
2005	182000000
2006	77000000
2007	48000000
2008	29000000
2009	-48000000
2010	-70000000
2011	-132000000
2012	-99000000
2013	-123000000
2014	-123000000
2015	-153000000
2016	-116000000
2017	112000000
2018	-94000000
2019	-235000000
2020	-408000000