Year	current US$
1970	19570701.8266529
1971	58399793.5161135
1972	81516396.788388
1973	140468396.575806
1974	818032757.873896
1975	711538860.064571
1976	789066805.737585
1977	838276237.803372
1978	800866135.073082
1979	1696758786.33027
1980	2476885490.08206
1981	2017297108.91211
1982	1207588127.94894
1983	1465764363.49331
1984	1469967800.25781
1985	1405786125.75985
1986	681446205.446731
1987	903278458.370932
1988	660935376.460992
1989	961537571.002637
1990	1196360655.07653
1991	553374930.708648
1993	434097218.592198
1994	356657322.538539
1995	388595354.098112
1996	535912421.660461
1997	477614742.264528
1998	174329865.652282
1999	639832580.886895
2000	1442935954.24405
2001	1157774635.25234
2002	572321652.392087
2003	681641699.980476
2004	918154691.752028
2005	2470489363.62182
2006	5078904553.72015
2007	8500282247.55838
2008	14032255618.9459
2009	9071208989.28394
2010	10261606567.6466
2011	14456462047.2474
2012	13216462143.192
2013	13678607746.5489
2014	10937435841.1541
2015	4754159964.50528
2016	3496567000.30235
2017	4877632483.15452
2018	7849132104.8318
2019	6728835782.37283
2020	3135668408.89469
2021	8509012619.83659