Year	current US$
1970	26300000.10319054
1971	27920000.068843372
1972	31470000.10125339
1973	33070000.11019408
1974	41749999.826774
1975	39060000.07502734
1976	44900000.03762542
1977	56630000.036209814
1978	65810000.01169738
1979	64639999.924227595
1980	20289999.926462766
1981	83460000.0679493
1982	75160000.089556
1983	109690000.15780331
1984	83479999.54037368
1985	132320000.01519915
1986	109740000.31314792
1987	149300000.63963237
1988	107450000.30845402
1989	153350001.1637807
1990	141480000.0246614
1991	184720000.10870397
1992	146740000.86076558
1993	224499999.9795109
1994	159080000.1248717
1995	359140000.6115437
1996	151989999.92012975
1997	227700000.19297004
1998	162569999.88108867
1999	246040001.39422715
2000	252940001.3424456
2001	216559999.268502
2002	250940000.29936427
2003	282000000.97230077
2004	254050000.26337805
2005	319339999.99798834
2006	207840000.52884224
2007	271289999.83891845
2008	94989999.7189641