Year	current US$
1970	1029140004.2325261
1971	1231629999.8369064
1972	1650480005.085468
1973	2614179988.795891
1974	4152180029.0942183
1975	5383780001.152309
1976	4704530039.072038
1977	5759009927.09398
1978	7115410040.885214
1979	9919279898.405077
1980	11186300051.45073
1981	10402200040.81726
1982	10190549913.883213
1983	9341559908.866882
1984	9417280028.82004
1985	10340499900.817873
1986	12624259954.929358
1987	14623899968.147278
1988	15093869985.580446
1989	15191899993.89649
1990	18920339901.447292
1991	18955579979.181297
1992	18811550020.694744
1993	17276399847.98432
1994	19865969818.115246
1995	19798360010.623928
1996	16486160058.021547
1997	14625059994.697573
1998	15019699933.528906
1999	14638720015.048983
2000	14096660060.405731
2001	16190879980.087282
2002	19902650181.770332
2003	26157679883.48008
2004	28114930121.421844
2005	28448910106.658955
2006	31482609876.632694
2007	37010880087.85249
2008	41832659744.26271
2009	46312200109.48186
2010	48491569625.85451
2011	50397010009.76565
2012	52085800182.34256
2013	56773710212.70756
2014	52817170200.34791
2015	53188199926.376366
2016	56362480389.59507
2017	63718109487.53361
2018	68801490209.57948
2019	67644209732.05571
2020	82544539848.3277
2021	76514730072.02153