Year	current US$
1977	2870620.99998474
1978	29185883.9997483
1979	36957073.3057768
1980	29604572.1897878
1981	21589414.2240283
1982	37229915.3931915
1983	47329546.6703864
1984	44703981.4169752
1985	35605975.3954306
1986	29571754.064071
1987	36748876.1367022
1988	39619761.8118448
1989	26162215.1549399
1990	17599672.6465693
1991	8542562.90320273
1992	23497502.9906362
1993	20068807.6520777
1994	17418038.8407058
1995	15905273.4537584
1996	32583561.8723326
1997	36339715.362031
1998	49034706.4758362
1999	51143527.1707584
2000	32044869.2772408
2001	18070277.3465433
2002	18687274.5467029
2003	37005791.598284
2004	79812571.6179989
2005	94825566.293426
2006	104075013.506124
2007	120530168.359389
2008	88829534.5674311
2009	145987707.520229
2010	265834982.908909
2011	412272152.61395
2012	469491017.816604
2013	491517511.122696
2014	466909894.035375
2015	494079337.706361
2016	486413103.312802
2017	543062273.519112
2018	586304110.457656
2019	535018679.361413
2020	660995997.34991
2021	684504857.823578
2022	647286192.979699