Year	current US$
1960	6.687919953120606
1961	10.411839821944135
1962	9.768318900426822
1963	9.707835887859103
1964	15.775226821014453
1965	18.039319043276677
1966	31.1034942042195
1967	31.552228318006712
1968	28.73055199237662
1969	22.76999687539255
1970	23.976603915388083
1971	29.215130323535313
1972	50.12759291385124
1973	54.88051611546391
1974	52.70623865867253
1975	69.97925436059649
1976	61.81956863056897
1977	58.55250765829624
1978	80.96360068833357
1979	111.25909755132558
1980	112.15902849104282
1981	98.16361812419991
1982	98.865209777869
1983	97.21726223543321
1984	92.73360836374354
1985	83.97265904623326
1986	85.3584006808566
1987	126.88048564145444
1988	118.76899118648319
1989	121.33634569826475
1990	108.25405577797483
1991	94.93808947823457
1992	78.3137845464579
1993	88.83496520902821
1994	56.6528151521843
1995	58.08371910835691
1996	47.13150092994124
1997	75.10402465834031
1998	64.17229218595892
1999	35.99640059025372
2000	17.73032240536739
2001	16.419494704770223
2002	20.784010836703192
2003	15.359662692792181
2004	25.071473660618853
2005	25.50180787463471
2006	34.5361447948216
2007	53.66102554923519
2008	360.4656992030264
2009	138.0285121570305
2010	73.94591013133324
2011	55.528559251784294
2012	33.58883882221828
2013	48.42424032826826
2014	43.96171377973488
2015	28.431730624551193
2016	38.50084325851559
2017	42.504911375400106
2018	35.0206752419205
2019	27.067227878406868
2020	31.012385797962416
2021	37.25434378584018
2022	34.03419107319724