Year	constant 2015 US$
1961	651.5636456248941
1962	660.3528641652714
1963	660.850898686176
1964	670.315539631854
1965	671.056337508956
1966	688.2719953999901
1967	715.4141261033914
1968	739.2941294065029
1969	778.445447385093
1970	790.7999591645547
1971	784.3026281701173
1972	765.3698172969243
1973	803.502195187049
1974	818.9483542430565
1975	853.5598006433646
1976	866.346129225172
1977	894.5298871672026
1978	928.3360211314296
1979	969.9133720937444
1980	1008.5291808165911
1981	1048.1064010096256
1982	1074.5574436711252
1983	1110.4846656351604
1984	1151.364568870557
1985	1192.4165665888072
1986	1227.1450214917884
1987	1231.0340801250404
1988	1244.4323825978454
1989	1256.7986298107435
1990	1320.6373544978455
1991	1364.5320400770377
1992	1407.7700853964373
1993	1487.9249120594584
1994	1555.0102578049996
1995	1625.5710675316905
1996	1673.995083718732
1997	1768.9965743223052
1998	1840.9678931042122
1999	1908.866425211767
2000	2011.980470686364
2001	1965.8209112265629
2002	2023.393935674962
2003	2122.2151440587027
2004	2216.272054374729
2005	2332.652317903205
2006	2486.647621748515
2007	2628.1568031565016
2008	2756.1219798481534
2009	2826.235415353544
2010	3025.3011510418237
2011	3257.447440345305
2012	3512.134256274032
2013	3634.617028533613
2014	3846.8262383972365
2015	3990.3531173944552
2016	4174.636995728185
2017	4427.542550698314
2018	4495.710462844182
2019	4458.434427258489
2020	4229.749594418543
2021	4360.566923969757
2022	4035.652667053798
2023	3968.676364794243