Year	constant 2015 US$
1960	1716.0375799368978
1961	1634.7993890890875
1962	1731.2667634046618
1963	1668.5197729672395
1964	1612.0598854202005
1965	1616.8562906961822
1966	1578.51924969765
1967	1517.2871537872788
1968	1537.368177224689
1969	1567.2802432175665
1970	1549.119421529169
1971	1619.88099495048
1972	1606.4893744111946
1973	1653.047572427148
1974	1717.3291723517048
1975	1704.7870257682785
1976	1814.0374528570817
1977	1845.4424085365574
1978	1922.1708657405688
1979	2027.2552027013999
1980	2134.257092296653
1981	2032.511245642483
1982	1920.8984050342717
1983	1899.5443862685197
1984	1867.219250111539
1985	1840.711158168071
1986	1794.3317591550654
1987	1743.6454668208833
1988	1711.2217209134828
1989	1627.277527793594
1990	1610.6549297735294
1991	1608.263799786444
1992	1493.3366566717214
1993	1385.3571361129234
1994	1196.9617636130147
1995	1291.0773813262388
1996	1319.7468925421533
1997	1330.683681895407
1998	1335.1362579246033
1999	1346.5905168942318
2000	1333.7271627542955
2001	1305.4977663710401
2002	1296.4106622457064
2003	1318.5941355234704
2004	1279.5465790413296
2005	1297.0859792146528
2006	1298.0348671097152
2007	1336.8323204863702
2008	1350.233470809016
2009	1406.9350255113782
2010	1312.2848471829386
2011	1363.7488258629392
2012	1349.6892405486522
2013	1387.111157353522
2014	1406.4122257531824
2015	1405.7147763435376
2016	1411.143100821452
2017	1426.6336823629024
2018	1430.8187670992254
2019	1387.5149038275165
2020	1324.28327669834
2021	1284.4779263798623
2022	1247.8923817176496
2023	1210.03466873287