Year	constant 2021 US$
1970	20702939785.778534
1971	21091809525.638813
1972	18516209947.13903
1973	20953280150.987213
1974	25412159679.41284
1975	29652029630.221428
1976	28224149349.21265
1977	25041460611.609745
1978	25615640042.543427
1979	24269440122.414383
1980	28189930134.370937
1981	29551810045.298195
1982	27023929960.06087
1983	25734999797.916042
1984	25950589513.249718
1985	27483839666.02386
1986	24801109977.11123
1987	23802280284.53887
1988	23291040157.645958
1989	24302099883.426
1990	34751209727.57416
1991	36423109511.65298
1992	29742060162.68209
1993	27005250031.420967
1994	27425110038.757328
1995	24457330129.146584
1996	24380780047.89353
1997	22964439908.027676
1998	25414540022.134785
1999	27029699630.260487
2000	25177230217.933674
2001	27004939878.463753
2002	27585529931.068436
2003	27215930188.711742
2004	28071260313.838722
2005	51480149781.70397
2006	35034920134.78279
2007	32813630161.762245
2008	36131110370.63601
2009	29595719836.47348
2010	26886489846.22957
2011	29655569750.78584
2012	28878399908.900288
2013	31899099906.206146
2014	33498020376.50348
2015	33035269612.550755
2016	34948120250.46351
2017	33294120104.730145
2018	28559640001.29703
2019	25364910138.130207
2020	34609030038.3568
2021	37526589994.7882