Year	constant 2015 US$
1960	1558.7914613948874
1961	1593.9998639746675
1962	1629.73185477127
1963	1664.2429446185001
1964	1697.487596849399
1965	1729.0920080834608
1966	1757.5361908446403
1967	1788.4591347242078
1968	1863.1266152241956
1969	1903.2355207645037
1970	1949.2017057621986
1971	1990.3922873230688
1972	2159.340427243418
1973	2242.254975184724
1974	2511.758458631858
1975	2558.615277015766
1976	2506.5788010068304
1977	2616.2611911269614
1978	2767.6028393201327
1979	2915.007913559731
1980	3231.273712540921
1981	3188.1465260539944
1982	3108.547259288435
1983	2970.893370058788
1984	2959.9091434430807
1985	2921.9168697168734
1986	2985.95270708503
1987	3233.230078021753
1988	3471.7783621711656
1989	3838.2842692612903
1990	4112.335134648097
1991	4501.236626334973
1992	4972.206392903691
1993	5171.997425905045
1994	5060.490179506172
1995	4968.7931887733
1996	4873.270304032342
1997	4909.383084728936
1998	4923.842543515435
1999	5206.651842891688
2000	5657.456684104124
2001	5755.7570073367115
2002	5879.604206774878
2003	6252.220718080968
2004	6355.399592635977
2005	6305.350560277763
2006	6399.145910766736
2007	6422.304327056677
2008	6147.690927383494
2009	5954.405581931203
2010	5879.733300725519
2011	5729.992057056593
2012	5807.263052784815
2013	5930.732390773898
2014	6034.4021955664375
2015	6098.600079589755
2016	5974.37916958583
2017	5750.503568743557
2018	5699.062801522487
2019	5833.173561886279
2020	4957.943867911413
2021	5768.908387841169
2022	6191.662837467956
2023	6385.373584319134