Year	constant 2015 US$
1960	907.916480048489
1961	971.2089582088626
1962	1068.6321466958748
1963	1378.5780413377756
1964	1438.9401573106816
1965	1640.2402546390604
1966	1440.5968198582214
1967	1790.5959073560261
1968	1789.6067004649274
1969	1829.3433737231096
1970	1885.5196632334112
1971	1994.6367946081548
1972	2103.707924389319
1973	2394.543802947907
1974	1974.955440625363
1975	2018.9381557529216
1976	2289.5471870958772
1977	2482.783602018432
1978	3340.998829863963
1979	2947.854416153513
1980	2908.5053038934225
1981	3123.4124035925583
1982	2721.117213269717
1983	3248.9542552206476
1984	2894.009495989768
1985	2653.991157932455
1986	3206.9696631214197
1987	2619.475265096003
1988	2243.048025696045
1989	2956.567321875794
1990	2789.253405747083
1991	2662.424735557628
1992	2531.0094956499534
1993	2444.702929779037
1994	2128.7206483518275
1995	2109.6310144134986
1996	1861.9971799442794
1997	1802.7013736738263
1998	2127.475217059859
1999	2194.019717356722
2000	2234.165899281652
2001	2170.183931823728
2002	2158.799029870145
2003	2107.2351610021065
2004	2107.2685780883303
2005	2150.2978912351405
2006	2216.0339027168825
2007	2225.4539305039816
2008	2226.425905997344
2009	2262.3366501312375
2010	2350.395394227679
2011	2432.711599911404
2012	2493.720912321713
2013	2604.0881517951943
2014	2658.0462945699333
2015	2682.9153031270594
2016	2668.726437359098
2017	2612.3060819102834
2018	2540.375269140763
2019	2506.341173947154
2020	2402.872537590599
2021	2319.284623643318
2022	2265.646967047891
2023	2250.7773078143387