Year	current US$
1995	232000000
1996	262000000
1997	344000000
1998	356000000
1999	365000000
2000	371000000
2001	361000000
2002	402000000
2003	437000000
2004	568000000
2005	593000000
2006	517000000
2007	621000000
2008	557000000
2009	548000000
2010	630000000
2011	650000000
2012	852000000
2013	856000000
2014	875000000
2015	809000000
2016	708000000
2017	717000000
2018	541000000
2019	481000000
2020	151000000