Year	current US$
1970	3814548965.79665
1971	4177119721.84715
1972	5182998217.49997
1973	6349664950.48436
1974	7594371852.21086
1975	8844479223.51809
1976	9172645742.08334
1977	11204841181.9038
1978	13681008757.3067
1979	15797410412.7446
1980	19542687472.4524
1981	16967427045.3866
1982	14862843441.7732
1983	14043523677.9453
1984	13005951978.7778
1985	13361611049.1136
1986	18197484215.6504
1987	22392642958.0483
1988	23534612124.1832
1989	23660974765.1669
1990	29594811287.9821
1991	30960441966.5713
1992	34910105030.1461
1993	34172380044.9791
1994	37158694447.0484
1995	44889436239.5543
1996	44774201943.7371
1997	40631258451.2771
1998	42013669710.5173
1999	42753302466.7961
2000	39358825156.132
2001	40124650653.1283
2002	43930504261.6927
2003	55602075951.8639
2004	64024647359.7925
2005	67632106263.3592
2006	73060030980.6066
2007	84524370127.0908
2008	97034856974.9457
2009	94133168278.6799
2010	92815412409.6933
2011	101489267022.082
2012	97062186759.2968
2013	101800646162.268
2014	103260513338.471
2015	87704885911.3259
2016	89277934714.5452
2017	93858430851.7277
2018	101736042416.241
2019	100367270802.006
2020	105835091942.481
2021	115771352531.023