Year	current US$
1970	51419748.9322578
1971	50030181.2730439
1972	60208244.706485
1973	60266553.5827596
1974	86157952.2843903
1975	91395269.7887707
1976	84273285.1674628
1977	81487609.918923
1978	78466076.9672741
1979	82058950.7625499
1980	89421174.3388367
1981	93985242.2068979
1982	116364321.852776
1983	129296570.973795
1984	123862482.765928
1985	119174690.740938
1986	144337889.208822
1987	132149228.253793
1988	125075108.083364
1989	100698960.665751
1990	110642941.649285
1991	105265121.924981
1992	91361026.9615225
1993	90183049.2111499
1994	106161231.669469
1995	122267115.200986
1996	129281825.844917
1997	107559367.696828
1998	68603664.1499272
1999	75123728.5438073
2000	97429487.3230413
2001	78574851.496869
2002	59544136.5568153
2003	69745519.2439084
2004	93946360.1935959
2005	101818957.603182
2006	109787767.925225
2007	140120176.578156
2008	227496687.198028
2009	369613015.78485
2010	578362009.38677
2011	1031026934.45772
2012	1362852021.17738
2013	1644807755.88647
2014	1944111772.96232
2015	2212534321.4625
2016	2306005434.16517
2017	2495704661.73852
2018	2825491276.8421
2019	3131990955.66557
2020	4185802330.73863
2021	3921571494.03727