Year	current US$
1960	6.599345660598668
1961	4.244290079776798
1962	6.601363807482158
1963	7.08098370788649
1964	7.836372646449181
1965	3.983325782219422
1966	3.0759368563598666
1967	1.018254086731921
1968	0.773988493078465
1969	0.2912111049249909
1970	4.914613054050622
1971	3.901173575493526
1972	3.8518316607401744
1973	23.892819021621637
1974	36.28411413848042
1975	64.81991171662636
1976	61.36035750698945
1977	65.04070722697234
1978	64.89052966287676
1979	36.884337532288896
1980	31.615901206294904
1981	28.902501164933128
1982	31.61364292809203
1983	30.763828508244927
1984	36.32249893091264
1985	35.45818252149644
1986	32.46402030506951
1987	32.610087461664044
1988	27.566351688844833
1989	29.483997061998686
1990	106.00785490201545
1991	92.28364796153052
1992	62.30627454501482
1993	40.48779581814842
1994	42.88591998084677
1995	31.60616600521035
1996	33.461349460544575
1997	29.99474758200499
1998	28.84229461740933
1999	23.17692708978602
2000	19.20700046598082
2001	17.849196420349934
2002	17.59193241557736
2003	13.390409554176422
2004	19.38587353334939
2005	13.231817347206732
2006	11.27413803500467
2007	14.254533411925053
2008	20.745953166892328
2009	11.42477030566361
2010	6.866973101873194
2011	4.750333570272592
2012	19.87530228624814
2013	59.03442202029838
2014	37.00715653336611
2015	25.833318548093693
2016	24.426254358099687
2017	0.3252795002649058
2018	20.0586519903121
2019	16.156234577256328
2020	14.532713556804666
2021	72.6819681071958
2022	52.41098026241358