Year	constant 2015 US$
1960	1398.685897821196
1961	1410.278816493868
1962	1406.9253232891833
1963	1531.031575345761
1964	1649.9319978760793
1965	1808.3280917126153
1966	1890.5209881215062
1967	1985.233918059827
1968	2186.775108269556
1969	2379.4490818017325
1970	2510.4417179410307
1971	2596.672149683636
1972	2864.4258363717204
1973	2936.9292880409716
1974	3082.7483191732226
1975	3086.2556673838653
1976	3475.019221407972
1977	3417.603909810103
1978	3233.6068124555813
1979	3114.9436718276106
1980	2874.648562507839
1981	2703.952271960771
1982	2917.443230248543
1983	2954.6260777313855
1984	2847.8179629431684
1985	2868.83201234044
1986	2701.7324242474724
1987	2625.933386759081
1988	2573.1804730193685
1989	2564.9207684909506
1990	2742.2744961093576
1991	2681.604830014974
1992	2732.730677998055
1993	2714.2993753997716
1994	2712.907321796831
1995	2724.3357433620818
1996	2834.4474478431766
1997	2887.4612105672472
1998	2999.259547153487
1999	3067.8295644751884
2000	3189.410525642435
2001	3213.963648798674
2002	3255.706296320472
2003	3271.3359448685183
2004	3456.8963670827416
2005	3541.983735123407
2006	3658.1406611106663
2007	3805.2210431372964
2008	3872.395001315775
2009	3895.9261884882144
2010	4025.338529798291
2011	3913.8505461356826
2012	3979.4598564807725
2013	3919.8183972720767
2014	3911.2180245447157
2015	3862.5722046145
2016	3998.065146433844
2017	4053.8935629462567
2018	4057.4622408658315
2019	4032.9183847316513
2020	3794.027847925679
2021	3969.937345777715
2022	4083.704986595473
2023	4131.50402220791