Year	current US$
1960	1.3511857191127015
1961	3.4810040568253484
1962	6.038218257479766
1963	11.792534048775673
1964	5.71268541543832
1965	9.261115517707253
1966	7.609914328407684
1967	6.20449690076775
1968	11.699866678796376
1969	7.144442473211164
1970	2.477630293626702
1971	6.485191481048305
1972	8.705689050706926
1973	11.15174697521067
1974	17.128813355404066
1975	13.11777109139045
1976	17.170602002028346
1977	32.59532406654662
1978	50.789481176354215
1979	49.35590101961577
1980	73.254974894652
1981	90.70520303456975
1982	60.01780698808703
1983	50.756509626660865
1984	62.74263516642863
1985	56.12425015658163
1986	114.06331022731558
1987	111.79612054317502
1988	86.61198644588322
1989	98.68645163114655
1990	93.4638734521
1991	91.86589177980916
1992	96.56195112805638
1993	72.66913250336933
1994	57.128308897262244
1995	36.57353575453611
1996	28.192359584143947
1997	29.536782423928663
1998	29.08886649496457
1999	24.597223824808395
2000	34.53123664098741
2001	35.641647358061206
2002	42.35253390646646
2003	40.40843930180507
2004	38.046798773488746
2005	36.59429615695629
2006	43.943353361983505
2007	53.170661362759226
2008	47.491350973760944
2009	57.90900477351542
2010	62.51048430094901
2011	67.91572001062299
2012	67.43282468121954
2013	52.84561114851174
2014	45.83788278580085
2015	50.56958574633899
2016	39.677094933038454
2017	119.46587922330296
2018	95.76198318584892
2019	75.64720765620916
2020	116.90776921778557
2021	93.90450071005442
2022	100.76895743807853