Year	current US$
1990	37237066929.342
1991	50153542314.5397
1992	58579637655.4337
1993	67558956837.5794
1994	87969805938.7955
1995	119253736023.581
1996	135505478247.031
1997	135256643699.977
1998	148774533344.732
1999	144855992610.143
2000	147215418993.567
2001	162616543952.246
2002	169689819880.692
2003	183965073516.589
2004	210955411488.586
2005	257504293024.314
2006	287703716182.677
2007	357826560597.137
2008	455271791103.515
2009	373574854806.471
2010	400177923918.293
2011	440248634411.117
2012	418874659624.305
2013	435405778177.599
2014	454514261381.585
2015	403152853203.443
2016	395103863402.162
2017	440873228434.714
2018	495579686115.478
2019	502710596495.973
2020	505328890294.291
2021	569915124774.172