Year	constant 2015 US$
1977	2498802301.0352774
1978	2531727767.023506
1979	2699186471.5057135
1980	2872670369.051408
1981	3157633994.909764
1982	3220881236.4295993
1983	3057792760.002095
1984	3246443287.3407865
1985	3520524329.8019915
1986	3601998916.90843
1987	3552584128.560566
1988	3683775761.4933133
1989	3543203616.978058
1990	3881792621.3666553
1991	4062546729.326666
1992	4098577370.0299535
1993	4419011055.15176
1994	4491193390.017653
1995	4769090359.297453
1996	4977433953.043323
1997	5296175405.389707
1998	5548049193.013882
1999	5856562019.596092
2000	6198461895.142069
2001	6526105755.43824
2002	6810454080.2246
2003	7041935713.5256815
2004	7361499635.630463
2005	7512478045.688819
2006	7796653928.66958
2007	8250483461.4396
2008	8694565269.13854
2009	8876666291.11517
2010	9044595958.782743
2011	9350651197.422934
2012	9756514075.635092
2013	10462531262.204332
2014	11138112627.73199
2015	11295642529.725452
2016	11665097503.416004
2017	12298521381.957296
2018	13134215976.9476
2019	14037049585.12194
2020	14571769710.50931
2021	15698285607.0151
2022	16623744750.75077
2023	17719887117.7855