Year	current US$
1970	22659994.129
1971	22638212.209
1972	30732321.74
1973	28418270.11
1974	109083804.872
1975	362107662.211239
1976	419619361.94140005
1977	603376113.9954957
1978	716751265.420276
1979	936740654.510572
1980	1397703775.3731441
1981	1535195728.234267
1982	1686019494.213651
1983	1891603800.990925
1984	1673439422.9177287
1985	1502909701.881667
1986	1541440766.922546
1987	1995964556.305999
1988	2096648601.036218
1989	2370604950.5763683
1990	2355487645.770803
1991	2363396696.756224
1992	2681344581.150382
1993	3140667622.3474994
1994	3118474403.798473
1995	3051788008.478645
1996	2815778388.624455
1997	3654130840.0227623
1998	3705020874.671053
1999	4778602596.858955
2000	4798173841.405826
2001	4082403852.263469
2002	4627211271.900158
2003	5510716581.284648
2004	7806331696.7241
2005	20110839918.004597
2006	23282367301.069107
2007	25732374457.279984
2008	28431876684.79458
2009	28397099157.58274
2010	31639686581.829575
2011	37035410795.75208
2012	37213674089.51579
2013	37537539770.43235
2014	39679285754.15806
2015	42167423559.97867
2016	38548300816.56996
2017	42254951668.02657
2018	49498538592.26647
2019	49966538464.806274
2020	43069914113.194626
2021	49954370468.70797
2022	53554994871.81076