Year	current US$
1993	171300000
1994	503500000
1995	1384800000
1996	2388700000
1997	2140600000
1998	574000000
1999	190000000
2000	858500000
2001	889800000
2003	1336000000
2005	1609000000
2006	197300000
2008	2341000000
2010	745361000
2011	1644300000
2012	2150000000
2013	1716400000
2014	3538920000
2015	1651375000
2016	433280000
2017	1467570000
2018	1706020000
2019	1653340000
2020	254800000
2022	794510000