Year	current US$
1960	12.353809917002017
1961	22.146234949984304
1962	16.374169172737
1963	19.284889139254584
1964	16.19121621272807
1965	20.398080751665542
1966	18.210707020814944
1967	19.205061590082707
1968	15.017754557385148
1969	23.545511492181543
1970	22.35802770575151
1971	20.538243684953414
1972	21.305797972936276
1973	24.533049021466056
1974	31.036238466097437
1975	37.14114332256113
1976	36.73862969436954
1977	40.55299024647988
1978	49.64127186534154
1979	32.70632157046384
1980	36.557356761916104
1981	36.01100238141057
1982	29.982807114232568
1983	28.592902894239817
1984	24.192362673798076
1985	21.45773462511497
1986	28.696504879596233
1987	34.82975503931968
1988	39.01824989977008
1989	33.899780806109355
1990	46.50935294191994
1991	41.1070432784924
1992	44.07704937829024
1993	27.090933520858066
1994	11.570422124686363
1995	8.11159586904129
1996	13.452025662379395
1997	20.42488630621374
1998	15.599638107618793
1999	25.891730479141692
2000	22.524297853004086
2001	36.63986938637003
2002	21.53139756186683
2003	29.593485512243223
2004	32.42156117276935
2005	35.45801006431016
2006	41.670013759023036
2007	31.058385377064187
2008	35.66071573457012
2009	46.17087560779624
2010	50.49535045497791
2011	83.86382345630575
2012	91.47082258437088
2013	63.24265594957888
2014	80.73359089629518
2015	42.90357127586434
2016	55.35156934766488
2017	68.73758055204922
2018	67.61059379524205
2019	81.25691029841774
2020	80.18107423170532
2021	89.17596624773117
2022	98.11254126700969