Year	current US$
2002	412000000
2003	503000000
2004	744000000
2005	959000000
2006	818000000
2007	860000000
2008	1014000000
2009	923000000
2010	896000000
2011	834000000
2012	718000000
2013	750000000
2014	792000000
2015	710000000
2016	733000000
2017	725000000
2018	837000000
2019	665000000
2020	258000000