Year	current US$
1960	2.9200758655685894
1961	6.394525682554222
1962	3.1893722998952416
1963	4.034202106460504
1964	4.068450429863193
1965	6.950792381488875
1966	3.977062339099736
1967	2.8583465137018065
1968	4.015162399756134
1969	3.2331451379762783
1970	2.386130683819306
1971	3.6753386704284225
1972	3.5335174258758446
1973	4.785318291201608
1974	3.441327103427622
1975	5.441903233193125
1976	4.176219769389144
1977	7.969245486688397
1978	12.150830210867126
1979	16.03620757887963
1980	26.89253632870954
1981	17.340158782942257
1982	23.29592781482487
1983	18.07141808802671
1984	15.795379557547196
1985	17.0159694707528
1986	23.547216310882984
1987	16.720430444361824
1988	25.028258276019884
1989	23.72111976907599
1990	13.714376535659737
1991	23.587485234824417
1992	30.932920140849635
1993	48.06446677604058
1994	63.43754172671823
1995	49.089428757533796
1996	41.984005104801525
1997	26.789841548391976
1998	23.93946005973
1999	16.47544456256358
2000	39.40605566839403
2001	68.8950774048553
2002	74.55283404374146
2003	63.011749863664974
2004	67.99342872732274
2005	59.82052277524566
2006	65.46554071430162
2007	86.27983314749586
2008	53.94312093178861
2009	65.69814537900876
2010	71.20110152643001
2011	64.10546491900246
2012	64.77636513082545
2013	64.47510244767253
2014	128.00307607570517
2015	129.45992592020627
2016	92.50307842813974
2017	70.48067911078421
2018	64.63959167678702
2019	70.36809911114976
2020	102.13906654573978
2021	84.27624133893501
2022	60.82815759279179