Year	current US$
1960	0.24892494978517962
1961	5.629753833717518
1962	7.787308555320808
1963	3.557709867057746
1964	3.1084694180768166
1965	4.5593019876050604
1966	48.78931176494189
1967	0.244002424139931
1968	0.9487621167842276
1969	0.6460663814562614
1970	4.2686077063156125
1971	20.347024179474356
1972	11.680368812465545
1973	55.488013073654884
1974	139.26917353667224
1975	90.69992778501242
1976	543.7869234582562
1977	152.09125184952194
1978	253.72304142633902
1979	390.22545129070346
1980	569.5886561571367
1981	522.3750196383675
1982	398.95963602605514
1983	630.7995657581429
1984	503.84407412080856
1985	170.49783610611524
1986	221.03706415923398
1987	18.946985205893906
1988	-5.399958817752065
1989	-3.517544734701698
1990	265.7425910965602
1991	176.8721402057137
1992	144.48031563538444
1993	194.21181567947292
1994	161.46541096314107
1995	162.93761277165567
1996	209.11695396680395
1997	230.26371045011896
1998	296.98848035150723
1999	89.40478357210998
2000	84.94016420899497
2001	96.9658593599155
2002	82.29056108190396
2003	169.31447270880147
2004	69.85413806054956