Year	current US$
1995	294000000
1996	282000000
1997	266000000
1998	271000000
1999	276000000
2000	310000000
2001	322000000
2002	303000000
2003	355000000
2004	427000000
2005	452000000
2006	498000000
2007	530000000
2008	555000000
2009	478000000
2010	611000000
2011	678000000
2012	673000000
2013	768000000
2014	770000000
2015	767000000
2016	823000000
2017	871000000
2018	954000000
2019	889000000
2020	407000000