Year	current US$
1960	0.007960883225369903
1961	0.5801155288589794
1962	1.4460328955131334
1963	1.614809633999944
1964	6.728430091842588
1965	6.535462437269464
1966	5.35027446201194
1967	5.721340973191879
1968	4.529132365552261
1969	4.437441313091803
1970	4.87523653368633
1971	9.3835571266098
1972	6.348989394123732
1973	8.204797557844536
1974	10.017338657786928
1975	16.015021329294584
1976	14.666235493792643
1977	13.765862942202041
1978	16.59092969217911
1979	22.6690967272886
1980	23.012886578772797
1981	20.611080984189165
1982	19.65772785471587
1983	20.35945606120537
1984	17.47700335174989
1985	21.24876088393335
1986	29.58881459937773
1987	28.514836981983187
1988	32.69501128827554
1989	53.79261219941603
1990	51.98874373644797
1991	50.19038256272645
1992	49.29478783214011
1993	50.429527168105075
1994	43.28261886391704
1995	46.40031210703065
1996	46.469457490162895
1997	34.6248776655182
1998	31.1701536435939
1999	31.29369040332328
2000	34.97702197784446
2001	38.88219900964705
2002	29.80980382313814
2003	39.428357375119596
2004	49.627883797478866
2005	42.83495382582072
2006	47.641030239051794
2007	47.82856341098731
2008	61.00397554741885
2009	64.00099119968299
2010	72.97175326484192
2011	69.15316750441202
2012	50.71660165646933
2013	64.04280762101936
2014	56.46055724645779
2015	39.93768145611351
2016	44.47213407053543
2017	58.636971524593164
2018	48.127899608069406
2019	48.26188322769552
2020	83.01508624799901
2021	65.39869564759506
2022	63.23512282587376