Year	current US$
1960	1.6460760065765176
1961	1.0708043712536364
1962	1.3416105781958712
1963	1.2478480146287314
1964	1.0611865632082425
1965	1.586605422402193
1966	1.3894223132276236
1967	1.8334715999469264
1968	1.9247289782169072
1969	1.961906925238238
1970	2.0672373757357985
1971	1.7034341956433952
1972	1.4180223345483542
1973	1.5638079666362077
1974	1.7758970920613066
1975	2.0658313564501225
1976	4.006243266486675
1977	3.058318652002383
1978	5.838830845437668
1979	8.676926168063712
1980	9.094893904961356
1981	8.65896498670548
1982	8.041242626870563
1983	8.597393567167465
1984	9.0902451873149
1985	8.833491900094772
1986	8.767203072556832
1987	8.750136786757992
1988	9.889916433240815
1989	12.584492384774105
1990	14.376477436782537
1991	12.72320387101199
1992	12.97265081861372
1993	10.0716421790952
1994	9.858043520157649
1995	14.074587147905419
1996	13.808750507404914
1997	10.245599839190762
1998	11.33431965840316
1999	16.269969102391407
2000	11.110000373892914
2001	4.467407518987087
2002	4.636998198966298
2003	-14.489566735051104
2004	0.7940449357518988
2005	-2.5004041519509013
2006	-3.229365683317922
2007	-4.546831739029492
2008	-9.091876213314267
2009	-0.4151081376403976
2010	-0.2982254984339075
2011	-1.9518911371708867
2012	-1.8995900838182118
2013	0.4137766509813937
2014	5.067256022630012
2015	0.8346326403361181
2016	3.2260240403417155
2017	3.5292855694803515
2018	-5.894882124220878
2019	-4.93144054871675
2020	2.7707331727080287
2021	1.8489938540422766
2022	7.726958843343999