Year	current US$
1967	12151238.735939775
1968	104639916.28806697
1969	150479879.61609632
1970	138479889.21608862
1971	101299326.27526467
1972	57325554.42931108
1973	61024991.73025813
1974	427331210.19108284
1975	353502316.1551824
1976	418934279.0966995
1977	390851476.5489288
1978	262883902.72148234
1979	759698899.8262883
1980	1495656629.9942098
1981	1930804574.4064853
1982	1162999420.9612045
1983	1236247828.6045165
1984	1120450090.7651196
1985	1265218373.1669538
1986	-123042185.2338592
1987	1547464499.3498049
1988	725617685.3055917
1990	2293888166.449935
1991	944083224.9674902
1992	1141742522.756827
1993	624187256.1768531
1994	1061118335.5006502
1995	1170351105.3315995
1996	2145643693.1079323
1997	1812743823.146944
1998	-1093997919.3758128
1999	1636890767.230169
2000	5419683224.96749
2001	4350614824.447334
2002	4267024187.256177
2003	3668797659.297789
2004	3097446814.0442133
2005	8459767230.16905
2006	9120936280.884266
2007	6940929778.93368
2008	12971994538.361507
2009	7736577373.211964
2010	14170024447.3342
2011	20298309492.847855
2012	20428608582.57477
2013	17553446033.810143
2014	19097009102.73082
2015	2303771131.3394017
2016	-168530559.16775033
2017	2003381014.3042912
2018	10947204161.248375
2019	11014564369.310793
2020	1697487126.1378412
2021	9821991417.425228