Year	current US$
1971	2032990279.23256
1972	2219921205.86874
1973	2479264385.54723
1974	3082625493.62036
1975	3188390748.54975
1976	2874261798.34273
1977	3316655779.93743
1978	2271035032.06225
1979	3173377780.94153
1980	3794184166.8525
1981	4132819097.77663
1982	4529827322.41329
1983	4859104901.43641
1984	5586625825.53532
1985	5669552262.1329
1986	6084041701.23863
1987	6336447885.55031
1988	6648354364.08664
1989	6647620235.16867
1990	7636421690.14548
1991	8494339520.24434
1992	9221711490.19108
1993	9836363273.25754
1994	11059112682.1879
1995	12198585838.0091
1996	12990592786.2439
1997	14169388875.8013
1998	14566826711.3729
1999	14398508536.1505
2000	15012707812.1137
2001	14624637906.5935
2002	15421206917.8058
2003	17725448503.2491
2004	19279545006.5641
2005	22683321043.9098
2006	26148292141.9034
2007	30006922204.6105
2008	37207806700.0471
2009	39095005629.8517
2010	54408057930.3145
2011	62684111325.4287
2012	64600135304.1871
2013	69880527349.8842
2014	74624464524.9212
2015	77120577630.7356
2016	79670269196.9178
2017	85121595616.7042
2018	85294116836.3203
2019	80057332389.295
2020	76513221048.3281
2021	80018415420.4858