Year	current US$
1968	153999999.99926051
1969	172999999.9992335
1970	186999999.9989325
1971	212631759.99786705
1972	219313420
1973	274189899.9996335
1974	355981439.99632657
1975	419053650
1976	553924319.9996905
1977	701929759.9985341
1978	745823999.9987411
1979	1062980000
1980	1293992779.99951
1981	1114369480
1982	1294097739.99924
1983	819000000
1984	901000000
1985	824000000
1986	1080000000
1987	1132000000
1988	1374000000
1989	1252000000
1990	1548000000
1991	1540000000
1992	1932300000
1993	2456800000
1994	1501513497.96806
1995	1617515986.3446
1996	2109215600.4446201
1997	2067027519.30735
1998	1857712934.5058
1999	1849483621.75618
2000	1997564669.69547
2001	2135185303.29747
2002	1821972845.37118
2003	1861009111.78969
2004	2366900715.44342
2005	2882575485.78681
2006	3619695111.98548
2007	4495024074.16268
2008	5385454830.43893
2009	5284983746.21781
2010	5933762826.4612
2011	6433147648.63797
2012	7452954562.10905
2013	8197137789.25779
2014	8439395682.15665
2015	8342097449.39661
2016	8569675597.746611
2017	9380289037.35554
2018	10557445955.7418
2019	10485253589.9064
2020	5703399351.32126
2021	7985097100.540771
2022	13404815991.4741
2023	15024348963.7108