Year	current US$
1970	3806293433.49823
1971	4390515966.5323
1972	5243614438.52876
1973	7446977712.88523
1974	10171165701.5155
1975	12967698003.8319
1976	15952541388.1253
1977	19433316588.297
1978	22246425223.1235
1979	23980829278.521
1980	26935915619.4739
1981	30224847708.1469
1982	32585928082.3802
1983	24224813235.1193
1984	23763153277.5828
1985	21675272833.5234
1986	24351831864.7089
1987	27588910773.6751
1988	31768167257.1979
1989	44289394864.5159
1990	54287486184.5341
1991	46045567690.1098
1992	45067737334.3428
1993	49463623754.8408
1994	66539132446.367
1995	91294445667.0757
1996	92869787502.8843
1997	105594628814.089
1998	113598834805.829
1999	84591056212.2525
2000	92399179474.1254
2001	80272855298.0706
2002	73701229373.4363
2003	82535858944.9224
2004	96587836343.1519
2005	128312140519.949
2006	154330224989.986
2007	192450885156.854
2008	244167095532.861
2009	278321654241.55
2010	385025663832.786
2011	489889589471.476
2012	515483832460.845
2013	517929284075.771
2014	518751321168.796
2015	404107555796.964
2016	405351855898.702
2017	435247433495.311
2018	388745145069.627
2019	376367268005.99
2020	279051432065.548
2021	296643158145.024