Year	constant 2015 US$
1965	267.7905942354347
1966	266.85123925706114
1967	298.70838041401817
1968	299.1609895768153
1969	301.0014582844425
1970	278.4667580090103
1971	279.2701894323723
1972	262.71357731796047
1973	255.88324344779534
1974	266.4107562428839
1975	278.16452416233705
1976	290.5472377960782
1977	315.9920581768416
1978	305.89175054918337
1979	305.6871446547623
1980	319.5418453534248
1981	323.8377129433819
1982	320.43076244171164
1983	312.8365509514082
1984	284.589836054741
1985	289.27458683059103
1986	320.96161652226215
1987	296.20882999748466
1988	304.59663013217863
1989	291.2168547419553
1990	275.24875876844993
1991	282.50979281357377
1992	277.596671275733
1993	288.8067115116664
1994	225.23175507751796
1995	256.73559372913667
1996	296.15688000354913
1997	295.7206474288324
1998	325.79464794710515
1999	369.88174001254254
2000	360.8063865581328
2001	354.4744693770118
2002	362.20571707893134
2003	369.21795647547043
2004	381.3816823770938
2005	389.754150267866
2006	393.9004417103546
2007	388.455351488469
2008	404.5181369013852
2009	396.9019237667854
2010	406.33269805797
2011	416.7518240867452
2012	442.59817071890126
2013	456.6925615352661
2014	449.1611885708552
2015	452.11666652337186
2016	457.7140940762961
2017	460.42468527393316
2018	458.5837072049309
2019	461.719857237973
2020	458.08225329891604
2021	460.78285335284284
2022	469.409520476749
2023	485.0930073901658