Year	current US$
1980	3268458612.58929
1981	4535265401.92498
1982	4170258061.09149
1983	3371564718.18873
1984	3832226281.70166
1985	3142027109.21325
1986	3737227322.1402
1987	4706664992.90932
1988	4285577193.00475
1989	3248993448.91976
1990	72401408.2277646
1991	351261756.958423
1992	-26014307.0084343
1993	-795087588.831296
1994	-190249316.53071
1995	3700367409.77543
1996	413184276.895888
1997	1721590358.79969
1998	2270860112.4034
1999	578605932.799571
2000	93795830.2100201
2001	424119858.403478
2002	769150895.562846
2003	510958171.445931
2004	786422117.783741
2005	723090015.114685
2006	282586698.640705
2007	-1762883832.815
2008	1347566967.66251
2009	2848381429.82521
2010	3007497632.22376
2011	4663644118.5356
2012	4524857499.84787
2013	5688122399.90763
2014	4923218353.43901
2015	3957824202.83294
2016	5142851814.2907
2017	6507971733.29299
2018	6173048181.19782
2019	6895880152.33167
2020	4379568957.88675
2021	6049633180.76906