Year	constant 2015 US$
1977	135863186.09649077
1978	139659293.2919937
1979	145653088.79534528
1980	154635494.57916206
1981	150497866.3753955
1982	157900866.36554775
1983	163691693.77928668
1984	167208579.1381549
1985	173377302.7240458
1986	182757348.14998868
1987	182737193.4088568
1988	196451156.95764276
1989	203074404.25128272
1990	215473611.25485578
1991	231741852.9134631
1992	242522651.25262794
1993	262340218.54558238
1994	279419568.325251
1995	285882816.4637672
1996	293866720.9431066
1997	315511997.0708852
1998	328648591.3637307
1999	341806627.16640925
2000	356492910.1800029
2001	367882525.08108675
2002	386236781.2793149
2003	412109200.7047048
2004	433991916.3709024
2005	445877456.1260932
2006	474750787.5359107
2007	483715353.28460824
2008	482693068.1446515
2009	468119928.66868323
2010	466787641.0283391
2011	468457740.3756157
2012	476898859.86916226
2013	488847572.9318475
2014	492848932.81383485
2015	509070370.3703703
2016	524525525.78018993
2017	529598097.7373235
2018	545074838.5597266
2019	557126693.9188737
2020	532429384.35453206
2021	531814200.095901
2022	580428146.8028126
2023	616303102.5166676