Year	current US$
1960	3.5927028467380984
1961	6.174790379278862
1962	8.457250592674127
1963	12.190395861986746
1964	9.4007356467833
1965	8.594315245879503
1966	7.145465380655938
1967	6.97511589715864
1968	9.5733918166328
1969	7.416244686978239
1970	6.4941112906261935
1971	6.8298158909814015
1972	9.954516542750412
1973	4.914072105815108
1974	10.770349228573737
1975	9.243773816539353
1976	10.458864526547325
1977	12.708995715061455
1978	20.947362945139673
1979	22.027028798593857
1980	24.04774864705806
1981	21.315063000397917
1982	18.277056135432485
1983	25.008905523332444
1984	20.92315193087602
1985	24.930977358262535
1986	38.528159116528975
1987	42.34373669756677
1988	60.046395387731636
1989	69.6892088040399
1990	68.35213475631049
1991	65.95130245004293
1992	88.83591998890488
1993	72.45288516123331
1994	70.0701137350606
1995	86.56794207671226
1996	95.13894850317152
1997	77.20808482522271
1998	66.29598020502145
1999	61.59578084820357
2000	49.58652907462675
2001	77.28716325759689
2002	67.44839266032842
2003	84.19986500318447
2004	76.67519322543632
2005	57.89245415491104
2006	84.63046170507519
2007	43.73528508468439
2008	57.12106698944466
2009	57.64717127872706
2010	54.80340630065038
2011	52.51606884861372
2012	62.60538695698893
2013	65.37067610788489
2014	61.78994236766921
2015	71.3529244869263
2016	61.84045832893102
2017	83.00093866586988
2018	62.79624026535825
2019	60.13255247117284
2020	28.398575791841886
2021	41.957132507465474
2022	27.332049969409884