Year	constant 2015 US$
1970	5456921778.022854
1971	6106318681.819785
1972	7370743026.028296
1973	6428115607.191783
1974	9072255891.06937
1975	9862657365.732702
1976	10338539777.14015
1977	11547626720.412916
1978	12516287725.321169
1979	12926733499.816765
1980	13976701369.599323
1981	14439695232.237263
1982	13791131916.171692
1983	13737301385.365715
1984	12490157956.049654
1985	15346253951.159111
1986	14130177695.369549
1987	16647548521.94706
1988	18969667452.986515
1989	16592467609.544044
1990	16087345505.405775
1991	16602117990.58788
1992	18892272038.236294
1993	19526087263.67009
1994	19019009434.46978
1995	20418474991.158802
1996	21485371104.10131
1997	21711850478.498817
1998	22871499257.08855
1999	21928294739.053402
2000	21983760384.255512
2001	21098907007.41564
2002	22257946625.74015
2003	24922798358.635406
2004	27902265337.986317
2005	32700428380.767723
2006	29295478986.690125
2007	33789959606.723343
2008	37752771559.4811
2009	37987105895.19335
2010	39813176003.939735
2011	43356020045.42442
2012	35251848060.06467
2013	24731409097.041428
2014	23574999451.215473
2015	18037876674.6577
2016	17514255335.09653
2017	13429130413.29482
2018	11308226736.179312
2019	13231986914.827906
2020	10400930612.725874
2021	13080241886.653585