Year	constant 2015 US$
1970	14522.7504476632
1971	15193.270415692145
1972	15737.166302360207
1973	16460.134244488116
1974	16977.915937366877
1975	17679.150567676777
1976	18144.18096881857
1977	18526.665026210594
1978	19038.968059818904
1979	19665.261047167092
1980	20146.444576322865
1981	20436.512022529998
1982	20500.20127524302
1983	20595.668733753075
1984	20871.93709258017
1985	21393.92076378327
1986	21993.747026716548
1987	22852.913077155685
1988	24043.11017356114
1989	24961.233156809372
1990	25581.970582235335
1991	27014.517337522208
1992	26037.01333960943
1993	26217.579552396182
1994	26908.793022145677
1995	27032.06753064106
1996	27331.650415219116
1997	27858.243231999302
1998	28967.184493123816
1999	30008.494296488432
2000	31111.93666526938
2001	31763.108144668156
2002	33054.77564251782
2003	33449.42698234121
2004	33368.905056665535
2005	32698.670459306624
2006	33507.656914557636
2007	33777.48135400379
2008	33968.61642381353
2009	34118.54166970487
2010	34613.08683502526
2011	34411.1908247395
2012	34411.65056960681
2013	33883.44471433964
2014	34092.31987056673
2015	34311.462722221935
2016	34707.456360601245
2017	34881.924595794655
2018	35118.264783923536
2019	35309.609193658915
2020	31781.64959083448
2021	34860.725354276685
2022	34949.12516939324
2023	35514.86532527832