Year	current US$
1960	0.06661147970375696
1961	1.7453067729559657
1962	2.654025893336491
1963	3.8291078382512493
1964	8.42804993895209
1965	7.339062301102177
1966	6.443702921627414
1967	7.214520543786366
1968	9.280127958000996
1969	8.238677035997643
1970	7.713721623831393
1971	8.495018870710224
1972	9.267586266411222
1973	10.799239826703651
1974	15.761109779636174
1975	16.61544597447577
1976	16.655828406461563
1977	24.2945975016639
1978	37.82950894395485
1979	39.645232294441264
1980	31.869799601933046
1981	21.368040035259213
1982	25.27004098637796
1983	35.50782123371164
1984	33.49375917666798
1985	33.23234868713577
1986	49.52651105809814
1987	34.212269753170375
1988	56.22403218412036
1989	52.900677746010324
1990	66.62629551806953
1991	49.93966597600906
1992	54.16905252149994
1993	23.494553661056663
1994	30.457322005085995
1995	44.71014031280064
1996	34.953684992718884
1997	27.24630047651479
1998	27.168345540448705
1999	14.69409731533248
2000	13.903656275049595
2001	8.957470217740552
2002	9.6808923968956
2003	9.239990944954243
2004	11.70304510145299
2005	14.463555571296716
2006	13.589843423328755
2007	20.254526406993456
2008	45.411140976256576
2009	76.17575488538378
2010	61.37993076274705
2011	80.36840505551507
2012	35.38226019287215
2013	31.848116254657572
2014	28.941948089364402
2015	26.69127377479039
2016	21.96087010207334
2017	43.925761775445054
2018	41.842106842015944
2019	48.979180661336024
2020	66.5057340846933
2021	40.57801589191897
2022	48.546120432418256