Year	current US$
1970	1784416529.85633
1971	1787930162.39397
1972	1792417622.35166
1973	2726682032.34786
1974	8058017233.45544
1975	5931539334.78779
1976	5372724723.34442
1977	4865314102.5721
1978	2331024682.90082
1979	4606191920.824
1980	5653743195.25702
1981	3178357223.10312
1982	-3155178872.59698
1983	-8812913702.32457
1984	6266697661.49997
1985	5627673004.09501
1986	663743082.77985
1987	2774909088.47241
1988	1611957722.36873
1989	1483557322.36013
1990	5910985443.66346
1991	4273589651.09189
1992	3229251826.97232
1993	701063449.170788
1994	2416401540.03836
1995	5084984513.52578
1996	10192647698.5814
1997	12963179767.8169
1998	6636483460.13252
1999	9863375508.83541
2000	22252535594.8607
2001	15474651225.3382
2002	11926416426.1785
2003	9822270192.4623
2004	24366253265.2454
2005	42121881871.0192
2006	54472221636.523
2007	59547987597.2776
2008	78419858272.2782
2009	19693650799.3195
2010	57427553424.1934
2011	39661552139.2043
2012	23363012375.8067
2013	-6522017798.75688
2014	-74209930701.668