Year	current US$
1970	17845574367.0053
1971	17759758414.3936
1972	19595788050.2834
1973	23609745989.269
1974	26848727356.7323
1975	23763175330.4412
1976	27853007881.6177
1977	31482420496.5347
1978	40789607716.6163
1979	53048984112.8536
1980	52118338931.1177
1981	33569566780.0603
1982	31009192289.7685
1983	35294075292.0892
1984	35738589010.595
1985	34553379813.5625
1986	48785675898.2911
1987	60930712118.0176
1988	69356888194.4346
1989	65718092916.1503
1990	82918084757.3043
1991	76311998169.3436
1992	64027674950.8149
1993	54543973427.4248
1994	57683283354.9517
1995	87710075921.1111
1996	103453418017.043
1997	98246155670.2457
1998	89821181293.4162
1999	80099368267.2306
2000	67224211155.2742
2001	72651861039.6865
2002	76145719966.5716
2003	81862739823.8663
2004	97706225603.3326
2005	85922378440.5961
2006	91480563984.687
2007	109559473859.043
2008	62128176325.0704
2009	5712046686.28564
2010	-5598113458.78088
2011	-649903220.936096
2012	-14830560949.5294
2013	-6116859006.25763
2014	14310507974.2425
2015	7514178345.54376
2016	46307028549.4796
2017	60343870478.4985
2018	74465404290.4507
2019	79211681304.6859
2020	45281844863.3925
2021	98521976655.7152