Year	constant 2015 US$
1970	985.6377844697022
1971	1017.0800388815618
1972	1019.6731444666593
1973	1015.3474772780137
1974	1051.1729808673035
1975	1083.9135133738168
1976	1076.1536907655516
1977	1295.4947271734065
1978	1299.0772003561867
1979	1473.8799297710646
1980	1425.0516829861908
1981	1252.8133527126658
1982	1269.025581404864
1983	1199.4357768484726
1984	1107.1825462695306
1985	1186.1975984953274
1986	1092.8348905935352
1987	1035.6833029541524
1988	1029.603605148884
1989	1035.3751011753443
1990	988.6908214111857
1991	978.2830978315915
1992	965.0282834877465
1993	956.3563244701188
1994	958.8155682158454
1995	960.2732775768859
1996	957.870360503454
1997	951.6435620069409
1998	960.543753726171
1999	970.5466507973377
2000	961.9687333999768
2001	974.2029489067354
2002	982.860086153493
2003	1037.212613751607
2004	1047.1110788063127
2005	1088.8715939048207
2006	1156.4787137018047
2007	1169.516832224179
2008	1212.6688605069917
2009	1223.7134596384706
2010	1214.106300005852
2011	1212.3818763747136
2012	1222.5644063785326
2013	1259.7324333373756
2014	1296.5115983697644
2015	1292.7330554652256
2016	1336.347008861898
2017	1368.5451498424559
2018	1406.103382134896
2019	1412.669660463811
2020	1422.9488284356105
2021	1420.9502962875483
2022	1395.1575280269165
2023	1361.7324502646857