Year	current US$
1960	19.9118196607561
1961	30.077753482329854
1962	57.38761572053177
1963	41.06734582326415
1964	15.23012176547852
1965	20.31706169939259
1966	23.87518205942931
1967	52.41852377761522
1968	48.073154634674594
1969	57.89496087509323
1970	49.21218981237451
1971	41.18904039825316
1972	32.06614925457675
1973	36.80788237473064
1974	48.359506998846605
1975	66.5897052633158
1976	87.13503393576806
1977	69.97936403935286
1978	131.14234424761935
1979	146.0975956886718
1980	99.90835991814404
1981	76.02646083472278
1982	78.93234476291558
1983	96.50567704316289
1984	87.0267505120197
1985	134.1809656695942
1986	143.90726454140713
1987	137.32600036399754
1988	143.06389097674597
1989	159.6015582851434
1990	166.05600389302862
1991	116.75301379242795
1992	137.46787869306775
1993	160.21465266407247
1994	162.1340928601791
1995	92.50525616393573
1996	100.21921791195912
1997	63.4220280206695
1998	64.56002017617816
1999	203.66686944214572
2000	67.17802225622613
2001	90.64893095976703
2002	90.94212083678273
2003	48.030668054969354
2004	24.620765997123193
2005	41.80116011423557
2006	26.772509928249292
2007	71.60812283298112
2008	76.45475311440535
2009	83.52139367133886
2010	75.13054945558139
2011	63.695233239014016
2012	77.7608640756446
2013	148.7432125799671
2014	106.60309470614898
2015	78.55592825696903
2016	95.17767975669987
2017	91.2747256098713
2018	88.54491588116896
2019	91.16025962991839
2020	175.60473733764752
2021	193.11003397236715
2022	50.28721244193184