Year	current US$
1960	10.191082574759324
1961	53.265692693339
1962	49.354591963412425
1963	20.204570832645665
1964	25.16039790920015
1966	51.60338946885096
1967	1937.1476092755545
1974	165.58249039502365
1975	235.3627773092735
1976	248.36976545543826
1977	193.79844510458312
1978	109.07056559006804
1979	158.14637997519583
1980	414.97885799931584
1981	332.9846524793236
1982	319.6231770810228
1983	250.9135131278368
1984	144.27977992461382
1985	154.5220392253469
1986	104.71587196455111
1987	148.7568112653234
1988	133.62571422488315
1989	382.34709303071435
1990	356.6626222489198
1991	374.1454307598825
1992	330.1772309553569
1993	196.38089248172886
1994	636.3372670087684
1995	80.90980805408566
1996	66.77704404784603
1997	100.58630545792964
1998	61.32396651211594
1999	130.70560312363628