Year	current US$
1960	2.7415435253002407
1961	2.5532924536254122
1962	3.833901559405458
1963	2.0894579204574932
1964	2.6671317891402873
1965	1.5586245278472315
1966	2.796411920284971
1967	3.179118064204779
1968	3.868873605073862
1969	4.359851030690313
1970	5.0516977295932
1971	6.052366454361808
1972	7.19714914355932
1973	7.52075504636817
1974	10.204828393336753
1975	12.661260018239227
1976	11.43337727536885
1977	12.130075812885277
1978	18.29722748176328
1979	22.80155476394942
1980	26.884873600106566
1981	26.866378576079505
1982	27.24741796514786
1983	29.114529974224507
1984	28.430891922740546
1985	27.720157311708476
1986	37.94548860219022
1987	38.121132434815905
1988	38.03226198063674
1989	38.37953749405
1990	47.877443184483624
1991	45.82803866293727
1992	53.85258946703679
1993	39.05335827352328
1994	55.690523383104676
1995	48.36684776891907
1996	18.635842878705983
1997	9.520816238777828
1998	11.391238936000292
1999	12.15174937851666
2000	14.793126508359727
2001	21.5366279656942
2002	25.85525743541435
2003	33.17375234825501
2004	50.39255795161166
2005	49.477090362112826
2006	56.412806291522145
2007	49.889177189653516
2008	54.950957356135085
2009	59.096150333032966
2010	68.76708100674489
2011	60.517782199896615
2012	53.51141918737777
2013	55.05943913621661
2014	49.109508998698985
2015	34.204805734733405
2016	68.11132186060621
2017	39.06739940442601
2018	39.27620943677715
2019	46.66758257335014
2020	39.38551941735362
2021	48.46065398096383
2022	44.7330483838622