Year	constant 2015 US$
1970	313.9355040981758
1971	311.37063960652796
1972	303.7232444253368
1973	319.4397573975558
1974	289.11827836523554
1975	303.24454129141674
1976	320.4943627431641
1977	332.40126863236617
1978	347.33858190607486
1979	325.50296801846315
1980	355.4978825967783
1981	338.38835725971285
1982	337.2619896851254
1983	367.8943198335101
1984	365.8249078150329
1985	367.6626605379879
1986	374.46270531011606
1987	391.0861248609585
1988	415.07020086046447
1989	431.3386672024923
1990	454.95604594042123
1991	442.1287733663345
1992	451.0238681566327
1993	485.9998725690112
1994	503.02725781502966
1995	516.77220978846
1996	570.2610072880017
1997	578.0804085347177
1998	606.8195890653512
1999	611.5995358555883
2000	633.6315707943069
2001	628.9761362209751
2002	648.6389759054734
2003	698.8810974878259
2004	749.0490455312136
2005	799.8830620458324
2006	853.2920869557131
2007	909.9202452055681
2008	921.7886340212211
2009	998.7062806363633
2010	1081.5734693710754
2011	1117.570013253985
2012	1169.8868917841187
2013	1226.5386914979022
2014	1289.840372570768
2015	1390.3125420467125
2016	1476.9017896311336
2017	1587.76931478847
2018	1663.4713407362385
2019	1692.2881500990936
2020	1561.1739452421218
2021	1710.9365803314665