Year	current US$
1995	296000000
1996	364000000
1997	494000000
1998	549000000
1999	455000000
2000	483000000
2001	761000000
2002	863000000
2003	783000000
2004	997000000
2005	940000000
2006	1060000000
2007	1396000000
2008	1361000000
2009	1319000000
2010	1489000000
2011	1831000000
2012	3609000000
2013	3772000000
2014	3771000000
2015	3046000000
2016	2580000000
2017	2695000000
2018	2852000000
2019	2955000000
2020	861000000