Year	constant 2015 US$
1970	5190.577872023468
1971	5873.640037201238
1972	6119.613138732024
1973	6853.242554011504
1974	7416.507886473098
1975	7076.76071827349
1976	7119.049185801557
1977	7086.117703563972
1978	6867.199520105014
1979	6801.717864944404
1980	6999.437021923511
1981	7130.4251600636035
1982	7249.700876986112
1983	7126.986935700407
1984	6886.668814267651
1985	6911.860959433986
1986	7294.87196631145
1987	7682.561540844305
1988	8215.514519156017
1989	8469.662437193469
1990	9034.6794288442
1991	9438.526335148235
1992	9893.284866837063
1993	9990.06690522148
1994	10065.37659511103
1995	10090.383577559329
1996	10406.0749703834
1997	10712.095846198632
1998	11168.062792456867
1999	11689.788962691831
2000	12035.936694808925
2001	12057.714280473008
2002	12145.702959931019
2003	12061.591216932042
2004	12340.380709341782
2005	12511.712210113172
2006	12678.605834543958
2007	12971.263624978565
2008	13130.227057758902
2009	12814.43779262284
2010	13110.27299716637
2011	12649.074140934603
2012	12024.98551694435
2013	11965.085549149457
2014	12316.171659165511
2015	12619.341637869535
2016	12983.243763660941
2017	13288.375421600083
2018	13657.749287131674
2019	14100.09514329648
2020	13096.245570109639
2021	13629.6694507448
2022	14319.985073497395
2023	14397.998883497234