Year	current US$
1978	252229212.8420209
1979	214063783.4852132
1980	473600012.09580225
1981	707514710.5556101
1982	683431913.2865679
1983	715414060.1036949
1984	385029027.2986087
1985	510175596.5294893
1986	634987731.2022133
1987	475249995.7366169
1988	518169961.2365081
1989	476163160.15552527
1990	748168727.6950469
1991	779846197.0638622
1992	734439070.076011
1993	842625464.2166966
1994	982880736.1860081
1995	689921037.7718157
1996	929167709.6456894
1997	748029656.3096842
1998	853159566.083406
1999	854643016.7640436
2000	729805939.6157812
2001	842910901.660433
2002	921310097.0092877
2003	868084556.4751394
2004	1013960623.466572
2005	1413348849.0446167
2006	2423694282.3278656
2007	2865615076.9447594
2008	2702896609.891163
2009	3246162766.1158385
2010	3302275561.2791824
2011	3778313405.76035
2012	2861840878.1755395
2013	2897511824.0384483
2014	3713542845.962481
2015	3700716693.3025656
2016	2202324727.991655
2019	1650489542.3467753
2020	1035329204.2017869
2021	1680426425.3629768