Year	current US$
1967	353322786337.40643
1968	367841878211.36066
1969	398852445257.81647
1970	427888839953.43463
1971	463360142676.55994
1972	513428167765.24445
1973	622365232765.0645
1974	744547680562.9512
1975	835103082501.5498
1976	878390554570.6582
1977	997380558038.4326
1978	1097784491579.7386
1979	1296946748252.734
1980	1582822034637.7134
1981	1763002110553.7131
1982	1719169826778.2358
1983	1771287368186.6138
1984	1821248273644.7915
1985	1887919582868.103
1986	1960540331468.6018
1987	1978709743358.223
1988	2127248931721.1274
1989	2105209297869.5593
1990	2407913733892.7393
1991	2389526158712.283
1992	2445441262518.2256
1993	2679519129765.9814
1994	2930492816484.341
1995	3293863099694.5127
1996	3597207916681.5615
1997	3811823255939.397
1998	3731061788084.008
1999	3625241027746.7397
2000	3900202250143.4663
2001	3925827848822.6777
2002	3930076699781.0537
2003	4344218727322.912
2004	5019794220610.025
2005	5903540179066.634
2006	6794507278504.02
2007	8288070322857.22
2008	9771842017168.324
2009	9587868596572.941
2010	11325394719057.033
2011	13257497017183.32
2012	14156333131332.027
2013	15017034903939.143
2014	15673120589429.807
2015	14658153727994.307
2016	14891931149569.52
2017	16286321799432.893
2018	17076447433300.99
2019	17642268122351.184
2020	16692112363517.117
2021	19415588276396.75
2022	20598642554798.062
2023	21996727644651.3