Year	current US$
1961	0.09248255341082681
1962	0.6239230373037098
1963	12.83339585651072
1964	13.170585618082788
1965	17.491291804207602
1966	9.590504511306536
1967	5.744594452665858
1968	4.753544133695054
1969	6.692948177918851
1970	5.4404434410712215
1971	3.9894813769577353
1972	2.9120530839468093
1973	2.1820385203214414
1974	3.15296390278275
1975	4.155530806847442
1976	3.5684314100451253
1977	1.9414010302669706
1978	2.918193061890059
1979	2.9937696538789096
1980	3.395835556177628
1981	-2.677879874139241
1982	4.122232384090525
1983	5.071405263521365
1984	4.3638009434030645
1985	6.051084343346384
1986	16.113518404325742
1987	28.421963844013767
1988	5.037629550981301
1989	4.083712209296949
1990	13.454211401280757
1991	-1.4652600207866096
1992	4.566309414967134
1993	1.1051226280805566
1994	15.483408638689696
1995	18.05291592460717
1996	11.496581009376719
1997	25.398828787946556
1998	11.008852765381922
1999	20.29293281869497
2000	-1.170992666117356
2001	-4.616877472953256
2002	-7.00613114851198
2003	-2.319829148950883
2004	-1.11668472531503
2005	-1.7603126825270272
2006	8.925724724441308
2007	14.78126636056218
2008	6.670002837338108
2009	4.781646334628998
2010	3.077368263533251