Year	current US$
1981	6184173551.58258
1982	6125715368.29099
1983	7469895723.1419
1984	7045847885.39986
1985	8604773030.5463
1986	8559630366.08306
1987	9228878116.84802
1988	9430621555.10186
1989	9877344499.43221
1990	10319145488.6342
1991	11455553936.9434
1992	8477903839.60378
1993	7156092938.11955
1994	5008647067.53438
1995	4910788780.21706
1996	5740512385.08864
1997	5848126624.04502
1998	4962549160.62491
1999	5761874971.72057
2000	6189019692.49771
2001	6217572072.42571
2002	5380864099.86479
2003	4730904784.37173
2004	6436677454.83548
2005	8475073728.9281
2006	10988999945.8071
2007	13701145112.1941
2008	19599043624.9229
2009	23979286257.7846
2010	22294529929.5057
2011	23258760582.8223
2012	31998806867.2355
2013	35448578250.636
2014	42605775685.1162
2015	49659215179.8291
2016	58385906770.7086
2017	65359461545.3577
2018	70731968226.093
2019	82027923370.9125
2020	92691294404.0473
2021	96072352511.7058