Year	current US$
1960	3.127084441787184
1961	5.078294661837075
1962	6.357819329612954
1963	5.411547653768532
1964	7.42909021234409
1965	9.402671241442258
1966	7.699657607653604
1967	7.549549848974363
1968	6.781174098198975
1969	7.663480279045864
1970	6.50429444829851
1971	7.431174958730791
1972	8.007989502380715
1973	8.094716040008134
1974	7.744499330923486
1975	9.56033834508019
1976	6.20979322133576
1977	7.521465729307297
1978	15.589118842822138
1979	12.884919603450834
1980	10.230696297415651
1981	12.473129680623204
1982	24.980594649755407
1983	85.58141614340873
1984	73.99673410979749
1985	90.84371837995347
1986	63.77796185219547
1987	76.75934804414423
1988	60.70043969966826
1989	73.18282840150262
1990	70.45034074217614
1991	56.80965717234567
1992	47.90876469931688
1993	34.39565405876891
1994	25.375793578361534
1995	12.90004415307751
1996	-0.05743614698717013
1997	1.0028290475985453
1998	7.792912816108327
1999	0.8842911567511708
2000	6.3982820346921345
2001	3.520656025691092
2002	3.211547544152885
2003	9.552094446972433
2004	6.057185907844667
2005	7.555805008414632
2006	7.277009813765106
2007	14.544983215399462
2008	17.170448582229184
2009	24.715507321908202
2010	21.878944993353457
2011	7.596273795154132
2012	6.008538011282096
2013	6.849579455190079
2014	11.260684591225893
2015	22.736363810360753
2016	20.36720443757195
2017	19.876480300384053
2018	19.725301970938318
2019	10.988228401726019
2020	40.697975153739776
2021	15.388176028359144
2022	123.51112431011292