Year	constant 2015 US$
1961	1235.6620051252414
1962	1210.5368612579725
1963	1153.513678450016
1964	1431.248794194196
1965	1614.388783866801
1966	1570.8181984910418
1967	1578.7676180684969
1968	1688.0322742257974
1969	1658.18934471457
1970	1801.726935383516
1971	1780.7203636625854
1972	1715.7168410176803
1973	1589.0624473988266
1974	1730.1841659247739
1975	1593.3559851998684
1976	1679.0325181521603
1977	1600.1109094139613
1978	1546.7334855514732
1979	1574.6094208256989
1980	1581.0451370779258
1981	1588.1697207670366
1982	1505.743843800072
1983	1516.437489276076
1984	1424.810246075886
1985	1424.9664171418863
1986	1463.0315625603134
1987	1448.0827297986648
1988	1430.67634248135
1989	1461.309363710923
1990	1398.9410590215891
1991	1382.4178998165144
1992	1355.0596286453458
1993	1377.2299685941866
1994	1290.0239783906327
1995	1377.9265915212209
1996	1429.0044620531198
1997	1340.5931314581267
1998	1342.0571884847386
1999	1354.1300447410536
2000	1265.1604247279847
2001	1224.6807669845036
2002	1215.2512697342956
2003	1271.6751179570176
2004	1303.2716919305217
2005	1384.0142951946461
2006	1601.142833086989
2007	1533.633813720638
2008	1490.8176662676544
2009	1452.1787514895404
2010	1448.0233220058956
2011	1463.5949223945431
2012	1481.9780029114982
2013	1499.4318236219435
2014	1522.7591186063298
2015	1562.7268364882764
2016	1541.1628775628596
2017	1595.2332756739122
2018	1628.038855163654
2019	1635.8399967697399
2020	1588.3620340046355
2021	1559.8098452060124
2022	1616.9818032846772
2023	1628.0875231038874