Year	current US$
1995	725000000
1996	890000000
1997	862000000
2000	827000000
2001	700000000
2002	409000000
2003	419000000
2004	591000000
2005	699000000
2006	711000000
2007	928000000
2008	1195000000
2009	1460000000
2010	1669000000
2011	2401000000
2012	2666000000
2013	2481000000
2014	2341000000
2015	2349000000
2016	2396000000
2017	2924000000
2018	2708000000
2019	2335000000
2020	1085000000