Year	current US$
1975	34052101.584719
1976	54609609.1285574
1977	150557620.523721
1978	27088074.0847673
1979	82851972.0177438
1980	-191166303.111488
1981	-196402188.340678
1982	-159313088.880108
1983	-157452465.876493
1984	-185114829.935049
1985	-76312872.5919533
1986	-1822165.28532621
1987	163627217.395577
1988	87315456.7802649
1989	266346797.108799
1990	233354267.177746
1991	170989682.375402
1992	228437718.147245
1993	140945224.078523
1994	211097100.421172
1995	222752454.37526
1996	212253918.753724
1997	299225635.280846
1998	298464345.933065
1999	206300154.872147
2000	161243219.158526
2001	267930402.95105
2002	270548735.065165
2003	477480998.532236
2004	428799455.550541
2005	422695524.509102
2006	829098306.842374
2007	825864968.056645
2008	641065967.155608
2009	993924824.060188
2010	758282821.731386
2011	1072628065.20331
2012	1199044454.69579
2013	1221444507.23346
2014	1409824111.74856
2015	1299545682.55894
2016	1765422759.84972
2017	1599091499.07882
2018	1882956005.91053
2019	1821855996.77486
2020	1833691738.93056