Year	current US$
1960	7.457905294841477
1961	6.9120136943210335
1962	4.81181856371666
1963	4.14910203654749
1964	1.4578121186279673
1965	3.8036930588448845
1966	3.9242261194502497
1967	3.9397205999158404
1968	8.420667030483921
1969	3.9719029987379977
1970	8.388645159141292
1971	2.485528113967963
1972	5.993699216774257
1973	4.5255718600648445
1974	52.86985998155707
1975	5.312852790412381
1976	12.750703251210632
1977	39.287172737145546
1978	73.176362086584
1979	42.54756221803248
1980	100.49255511258083
1981	150.29621579994068
1982	60.912668769345174
1983	40.521534194149005
1984	24.3965814140837
1985	25.53963079324689
1986	18.842144319713274
1987	29.83010304903432
1988	41.70200355002014
1989	33.41651701193022
1990	79.49466919213651
1991	34.15573583024293
1992	29.41469329473272
1993	36.757657417989336
1994	58.64751891372773
1995	48.309945673377634
1996	58.31577188256533
1997	63.599938317107934
1998	81.56200142727312
1999	45.76684215764538
2000	46.56483977182233
2001	45.33172359899367
2002	45.88156706000878
2003	118.68211327331848
2004	58.29111399428958
2005	49.69153883114246
2006	173.53041910261481
2007	203.54464869135384
2008	218.58522459768398
2009	111.2815487162287
2010	89.09283725086894
2011	94.24870412427038
2012	137.41477564898614
2013	109.45875769340276
2014	130.8424074121288
2015	150.90155328094386
2016	180.44555289598395
2017	213.28962024524444
2018	239.0083228311386
2019	213.84985281456446
2020	251.04880358523508
2021	250.20246089228843
2022	259.7737280078907