Year	current US$
1977	3178217192.9341083
1978	2967232960.07805
1979	3433732913.23614
1980	5285480971.86165
1981	4683441335.166226
1982	3202856828.177996
1983	2211455293.5100827
1984	1519841202.4892569
1985	1607788843.731852
1986	1066386702.0578713
1987	871754841.856079
1988	804061450.749031
1989	1324962812.6470242
1990	1901452779.2818568
1991	2386656068.77628
1992	1738505382.976196
1993	2681363028.4542136
1994	2980632842.334972
1995	1368691374.0233843
1996	1422760585.8352938
1997	1431955685.1478758
1998	1155062792.8097167
1999	3311049285.181311
2000	3143829926.710643
2001	4419718379.502168
2002	4688378125.972111
2003	5714692543.51124
2004	5973282016.94622
2005	6383601525.304528
2006	12114877563.44648
2007	15555608187.151173
2008	22569759002.77212
2009	16489628731.398272
2010	19868008136.03382
2011	22470101621.53124
2012	22412007841.9205
2013	20078679376.45628
2014	23245134255.826153
2015	18286128187.156
2016	11344932423.8108
2017	18003034026.20233
2018	30625184606.26042
2019	38451563317.60057
2020	19597958219.366978
2021	15791980063.31139
2022	18499872009.19578
2023	17252163120.4501