Year	current US$
1971	902481246.3935372
1972	1259115216.3344676
1973	1523584249.3390844
1974	1148648648.6486487
1975	1276259317.8224533
1976	1467264224.4738894
1977	1460452256.344426
1978	1659698996.6555185
1979	2367023940.6991887
1980	2315190117.7378883
1981	2080592789.9425526
1982	1734887108.5214858
1983	1807308096.7402732
1984	1800788136.472052
1985	1802557544.757033
1986	1820870299.9577525
1987	2461157536.3664503
1988	2941062801.9323673
1989	2972717050.36397
1990	2724556266.061077
1991	2944519468.827369
1992	2797745640.1531262
1993	3426801614.954925
1994	3599731363.3310947
1995	4123273113.7088203
1996	4515054807.825725
1997	4015633864.9687953
1998	3343333859.676825
1999	3687788676.1118894
2000	4079831379.2649193
2001	4299765611.920308
2002	3899650056.6809597
2003	5056186637.351899
2004	5575126050.420168
2005	5182707878.617194
2006	5558653783.80131
2007	8325126772.984493
2008	6673226962.817178
2009	6979823849.084889
2010	9652452428.244429
2011	10575830994.741705
2012	9722238442.727163
2013	13427827560.437418
2014	9616458811.492435
2015	7961784549.939853
2016	10483632376.742485
2017	12217491962.176369
2018	12002006561.687386
2019	12119575063.822779
2020	12154533713.056946
2021	14661196774.64988