Year	current US$
1966	2163062060.416246
1967	2308713720.859936
1968	2371711333.3333335
1969	2655298933.3333335
1970	2882252000
1971	3176702530.196733
1972	3759850632.4377995
1973	5025913546.574097
1974	5676246698.059033
1975	6738181580.870836
1976	7128052770.885029
1977	7946110740.938167
1978	9264156421.13662
1979	10726813913.704618
1980	11387279582.675348
1981	9606639104.921808
1982	9213831309.10662
1983	9421078840.896666
1984	9453488500.0869
1985	9967981201.16266
1986	13771836484.983316
1987	16488356504.83166
1988	17045696055.856794
1989	16621383546.277803
1990	20550784022.234432
1991	20392624560.30642
1992	22596384586.07379
1993	20504792177.547462
1994	22564132943.43301
1995	27227687598.17221
1996	26600342145.653336
1997	25381827087.591793
1998	25711659503.342884
1999	25369356526.47573
2000	23220007051.749947
2001	23131030542.60585
2002	24889759965.546505
2003	28870419569.804333
2004	32047909398.94176
2005	31829039170.237957
2006	34133222909.800232
2007	38176048459.68735
2008	41423767678.15461
2009	35674078606.204185
2010	35206590417.090805
2011	37989354925.6726
2012	37406355471.76678
2013	40473170774.95756
2014	41865752966.61002
2015	37541887296.22084
2016	40498995736.56829
2017	43206817963.32288
2018	46704879259.33575
2019	46454166722.49651
2020	45488002222.031235
2021	50866092402.59358
2022	46654256496.32177
2023	56282918626.60973