Year	current US$
1973	7461888332.28995
1974	11592061546.0502
1975	17871833574.2814
1976	9256479820.92843
1977	8655135497.21014
1978	12023371391.5923
1979	14263066735.1151
1980	16673013064.4567
1981	18980359303.43
1982	17353230970.7286
1983	16725202920.926
1984	17975463417.0409
1985	20954557856.2998
1986	20510705867.6273
1987	22982976922.9422
1988	25073441474.6544
1989	27150110324.6889
1990	29718966289.5206
1991	29167312910.6112
1992	29913967596.4493
1993	31412805715.3763
1994	32111483441.755
1995	36047091060.7267
1996	43911753999.3585
1997	45788735835.1384
1998	47399899093.6339
1999	48699214592.0465
2000	50759755864.0968
2001	51157911892.1475
2002	52338565275.5643
2003	57605843839.6695
2004	62559964229.613
2005	66741897884.1414
2006	69162037725.4456
2007	77464643918.9879
2008	90477993030.7096
2009	101403822815.232
2010	114093205737.914
2011	126960518030.501
2012	132381918586.563
2013	148630473444.019
2014	168853214206.68
2015	190332221808.999
2016	254207227699.906
2017	277679601303.089
2018	305777695036.025
2019	360627233626.55
2020	383459686377.669
2021	430454772495.358