Year	current US$
1960	9.640213196026718
1961	11.029268275527805
1962	9.795364268593218
1963	8.728743706178182
1964	7.750848216126779
1965	6.387442877246227
1966	5.859435831609513
1967	4.183282149470679
1968	3.8575715671487294
1969	4.026778994434308
1970	7.167341972217948
1971	6.93264170552561
1972	7.567075916132461
1973	15.729634669491091
1974	24.26230972144277
1975	36.77797692477193
1976	36.87120918803334
1977	42.379593335285236
1978	41.94439683414635
1979	46.68189135551769
1980	48.88290272992749
1981	45.27119439591348
1982	36.315540752718476
1983	31.668975224915695
1984	29.258821024468634
1985	32.47070750574251
1986	29.730483209802983
1987	27.809978894241407
1988	21.471993319073476
1989	21.11439249988939
1990	52.077525134732284
1991	49.910567674830865
1992	34.425207657791404
1993	26.145800087323682
1994	29.982827035380414
1995	20.91975256923285
1996	28.16195258816794
1997	18.9133030861518
1998	20.241160867154147
1999	17.126351033657183
2000	15.069612269567811
2001	15.206643026714152
2002	14.475479102297887
2003	24.68389445049176
2004	31.122742508203515
2005	79.73876012958102
2006	47.380279821435494
2007	48.32984409666904
2008	63.53390665173534
2009	33.261401352385114
2010	30.838656914290056
2011	38.41206580089632
2012	32.97783062948981
2013	61.168345474519505
2014	75.31713608043457
2015	43.83860725206823
2016	58.958061620753945
2017	61.475579669879245
2018	69.07663174927063
2019	58.50155619090271
2020	58.641928963480964
2021	71.21393866762331
2022	59.95072145372586