Year	current US$
1970	682634352.111993
1971	866657090.627434
1972	922160210.577337
1973	1662491319.85938
1974	1730787959.49747
1975	1096880396.88623
1976	1327141905.231
1977	1560002682.01138
1978	1736839449.1154
1979	2057195279.57785
1980	2653760206.32811
1981	3092565343.73258
1982	2754371100.50649
1983	2463869785.44107
1984	2436656974.34676
1985	2869054937.33095
1986	2968185172.95437
1987	3266183653.02994
1988	3634106048.76236
1989	4288859189.55803
1990	4746772770.25215
1991	5268486739.8824
1992	6143315903.87735
1993	6554680415.90503
1994	7491922478.64241
1995	9323765481.83324
1996	10369614998.5719
1997	10923299219.2146
1998	10423777121.2973
1999	10192199989.9519
2000	10138725456.0297
2001	9374612521.1677
2002	9060019468.08417
2003	9859363840.94843
2004	12724741678.7592
2005	15649235236.6469
2006	19504465110.6314
2007	21980134555.5262
2008	22954757392.6159
2009	22060808687.1673
2010	27610169330.022
2011	32281534989.9315
2012	34533029766.4473
2013	35642684913.1412
2014	32724306417.2912
2015	30710486934.248
2016	37568789799.3427
2017	41510117966.8798
2018	46849399168.2892
2019	45381710653.4664
2020	42197506905.5772
2021	54228509330.5567