Year	current US$
1995	528000000
1996	522000000
1997	571000000
1998	565000000
1999	607000000
2000	661000000
2001	687000000
2002	772000000
2003	962000000
2004	1058000000
2005	1113000000
2006	1091000000
2007	1447000000
2008	1222000000
2009	1060000000
2010	1224000000
2011	1191000000
2012	1206000000
2013	1223000000
2014	1146000000
2015	881000000
2016	888000000
2017	889000000
2018	800000000
2019	674000000
2020	109000000