Year	current US$
1995	122000000
1996	109000000
1997	122000000
1998	142000000
1999	212000000
2000	224000000
2001	250000000
2002	380000000
2003	372000000
2004	387000000
2005	414000000
2006	455000000
2007	479000000
2008	503000000
2009	408000000
2010	506000000
2011	718000000
2012	814000000
2013	839000000
2014	611000000
2015	4342000000
2016	2383000000
2017	2300000000
2018	1659000000
2019	1720000000