Year	current US$
1970	693629223.299996
1971	808012476.019444
1972	873805253.329329
1973	1083416426.66117
1974	2311848141.56871
1975	2895323097.04678
1976	3852206818.33137
1977	4300409181.81897
1978	5159790974.4681
1979	8136507846.41562
1980	11510686555.1135
1981	8970952298.49735
1982	10113873014.7637
1983	9578657978.5748
1984	10689309332.4679
1985	11309077356.944
1986	11444771434.0891
1987	13621323091.4237
1988	15066522564.617
1989	15833436458.3576
1990	43557518732.527
1991	96129973.4448447
1992	123358982.556189
1993	230826183.047592
1994	895495598.544463
1995	2968412495.05812
1996	2403450288.5734
1997	4685508347.72342
1998	3704824196.05366
1999	4443975439.94064
2000	5516159510.22385
2001	5738272438.77779
2002	5444243234.91019
2003	4146899414.27874
2004	6163706521.96319
2005	7429856040.02122
2006	9213147872.58558
2007	12166475061.7544
2008	17370613206.1472
2009	13797452775.503
2010	17803767807.6014
2011	24782654164.5217
2012	29026399083.9117
2013	29403816731.7179
2014	28280104612.2801
2015	17182904724.6384
2016	17085401013.9556
2017	20302434145.5386
2018	27188539597.8313
2019	26646050322.0847
2020	19700796858.9187
2021	21331370500.4881