Year	constant 2015 US$
1972	26000775525.358414
1973	26000775525.358414
1974	26000775525.358414
1975	28213609486.099762
1976	27262732646.557545
1977	37719065925.765
1978	45421623474.52421
1979	36848346142.20292
1980	44471922733.023224
1981	49864702901.41425
1982	48975232753.48021
1983	51017348277.96605
1984	52253691394.75303
1985	55640135990.593925
1986	45531467553.82442
1987	31465694839.1407
1988	33977361637.95377
1989	36558005629.05574
1990	32706488382.99399
1991	26925362005.417454
1992	22823000631.677483
1993	20489672759.820194
1994	22997451578.72598
1995	21930734166.06535
1996	17757123640.696396
1997	14460002867.282755
1998	21654592547.95439
1999	19224625317.044502
2000	20203104405.11964
2001	29130709870.611908
2002	33570354195.023907
2003	36472338855.640945
2004	40388000952.69595
2005	43668013021.62325
2006	45656089375.344505
2007	50387475762.49129
2008	56441140032.99708
2009	64525832400.3804
2010	69492491456.7347
2011	69102375090.01006
2012	76390860299.70972
2013	84546301549.10388
2014	91443841633.6522
2015	97083592007.27632
2016	97185615582.60876
2017	95021648408.39136
2018	93700348804.70177
2019	91191275338.11436
2020	81771760194.27199
2021	81580316079.29204
2022	84735301187.07213
2023	97349679665.29196