Year	current US$
1960	713000000
1961	696285714.2857143
1962	693142857.1428572
1963	718714285.7142857
1964	839428571.4285715
1965	1082857142.857143
1966	1264285714.2857144
1967	1368000000
1968	1605857142.857143
1969	1965714285.7142859
1970	1825285714.2857144
1971	1687000000
1972	1873249299.719888
1973	2435736196.3190184
1974	2913063763.608087
1975	2443545878.6936235
1976	2742796005.706134
1977	2514430379.746835
1978	2809862671.6604247
1979	3354854981.0844893
1980	3882889733.8403044
1981	4006206896.551724
1982	3870075349.838536
1983	3321048451.1517076
1984	2719801434.0871487
1985	2252197452.2292995
1986	1664509501.7976375
1987	2265364008.824456
1988	3728889426.566658
1989	3994585203.4168234
1990	3285217391.3043475
1991	3376791460.3960395
1992	3181921787.7094975
1993	3273505343.8553944
1994	3656806165.788479
1995	3806983413.1641593
1996	3597220962.0001655
1997	4303288479.708604
1998	3537741941.8936677
1999	3404284890.530603
2000	3600632111.414137
2001	4094441301.2142286
2002	4193850445.4263234
2003	4901869764.059568
2004	6221110219.455416
2005	8331870169.149771
2006	12756858899.281174
2007	14056957976.264833
2008	17910858637.904797
2009	15328342303.957512
2010	20265559483.854828
2011	23459515275.577595
2012	25503060420.026028
2013	28037239462.71422
2014	27141023558.08286
2015	21251216798.776245
2016	20958412538.309345
2017	25873601260.835304
2018	26311507273.67354
2019	23308667781.225754
2020	18137764931.280766
2021	22096416932.008896
2022	29163782140.485832
2023	28162630953.9285