Year	current US$
1975	123787635.266803
1976	-65279551.5278015
1977	43058049.9445993
1978	114699844.528953
1979	596351911.542029
1980	785446378.915987
1981	943222034.669185
1982	1090900562.17292
1983	1118987893.05453
1984	1192169634.20503
1985	1145585693.33884
1986	1245387113.18499
1987	1318917137.1221
1988	1433766304.81604
1989	1380924302.48839
1990	1593077390.71185
1991	1732293114.03777
1992	1952500273.71367
1993	2181469295.21426
1994	2302596681.87467
1995	2094170747.21045
1996	2330558888.41926
1997	2625379804.15494
1998	2619597010.75417
1999	2710726139.59199
2000	2627802170.17746
2001	2794505092.25125
2002	2685586072.17565
2003	3132890418.66917
2004	3416545235.81561
2005	4498448504.69565
2006	4710331579.15487
2007	5702080552.6734
2008	4852884677.19743
2009	7625538263.65045
2015	21350142676.2529
2016	24259518960.9686
2017	28304458603.9357
2018	26427845355.3173
2019	22069086766.9996
2020	20981365887.6528