Year	current US$
2002	-73000000
2003	27000000
2004	33000000
2005	-5000000
2006	-30000000
2007	-540000000
2008	180000000
2009	210000000
2010	-267000000
2011	104000000
2012	114000000
2013	149000000
2014	-6000000
2015	-168000000
2016	625000000
2017	878000000
2018	1168000000
2019	617000000
2020	807000000
2021	-487000000