Year	current US$
1960	62.86199365737564
1961	65.06514134209365
1962	67.33164932932947
1963	69.675722459319
1964	72.09782436432924
1965	74.58881752704232
1966	76.74466503053858
1967	78.96506646879882
1968	81.16811854537282
1969	84.50596687903551
1970	93.51989928605155
1971	90.88635173251575
1972	114.3080126154644
1973	120.25340762247686
1974	138.76117223194237
1975	179.03598330026463
1976	201.05876305994627
1977	112.04633428610174
1978	118.16804502172275
1979	109.00116700907542
1980	102.25604940547132
1981	117.82810082432118
1982	130.14185309564408
1983	119.72439321960702
1984	123.63511839009098
1985	132.06909791487774
1986	132.67428603278697
1987	142.3543021858891
1988	146.86162903878653
1989	167.91718141306535
1990	147.34504015473348
1991	106.63993887790635
1992	110.34256692564772
1993	190.33145077943212
1994	212.82208381890072
1995	212.83747513153207
1996	239.84560584439322
1997	283.3799218600589
1998	367.6428322114127
1999	363.26067817213783
2000	391.3101124869638
2001	248.3640503572732
2002	232.98906988827216
2003	290.699186830303
2004	381.48243237338085
2005	447.41719769549604
2006	466.08770203156865
2007	488.45734761780534
2008	516.7048898681885
2009	251.37129170602927
2010	223.4876068753108
2011	237.86845129655825
2012	324.88717649893863
2013	454.0772642392477
2014	491.18980412049126
2015	507.48291546709765
2016	517.0975815055017
2017	555.1851236130692
2018	537.159290210329
2019	589.4658919016268
2020	556.5780660293319
2021	576.523678242099
2022	592.1031219721415
2023	643.7500288067782