Year	current US$
1970	28084245.5912145
1971	31584757.6051957
1972	38381033.3069934
1973	41586322.5852899
1974	48815572.0688729
1975	65808035.051353
1976	77427006.61713
1977	80930754.1967313
1978	93437384.2618785
1979	105495667.676179
1980	126118396.596905
1981	89919561.9662343
1982	93011273.948371
1983	84292532.4032671
1984	74851380.2208817
1985	91633181.5813298
1986	123836497.717972
1987	145967128.854356
1988	146080074.018805
1989	132337809.237964
1990	154769860.901009
1991	150157608.171827
1992	157275623.958174
1993	143791282.514473
1994	76739176.8125017
1995	98494655.8738269
1996	105621647.708561
1997	89552334.0270581
1998	84821018.0586592
1999	86753389.9861657
2000	76796297.9288326
2001	75541719.8761833
2002	79334653.4200071
2003	93122324.0241847
2004	96988676.8552093
2005	96756499.2655852
2006	101085560.91883
2007	116235976.147413
2008	145812123.659247
2009	162164817.276813
2010	194731342.054517
2011	266578650.513327
2012	282006067.269204
2013	285983531.886467
2014	352437703.288527
2015	302507222.959331
2016	320018568.795861
2017	371590049.887428
2018	436970605.728379
2019	441403702.824261
2020	480471853.9968
2021	539258953.734052