Year	current US$
1976	897998.5714
1977	908085.3462
1978	1622514.009
1979	1109682.918
1980	1561627.388
1981	1342801.332
1982	919747.4122
1983	1110522.628
1984	797082.1857
1985	841833.5319
1986	1113886.833
1987	1785961.509
1988	1116260.409
1989	852472.0669
1990	605511.4865
1991	1597208.5
1992	1413590.312
1993	1473252.654
1994	1336275.578
1995	1092813.373
1996	780028.2836
1997	522385.18
1998	791909.2178
1999	476458.7879
2001	6343698.72640296
2002	8120378.64139975
2003	9114165.11956435
2004	9332633.79971291
2005	9247006.09311097
2006	10072841.9766428
2007	9947909.84909211
2008	12740006.7464899
2009	10257767.0994545
2010	8458860.23576011
2011	9445395.35553579
2012	8187835.34215211
2013	8310946.43768906
2014	700782846.648113
2015	599739064.395452
2016	599031731.597971
2017	581452822.992229
2018	747332851.203287
2019	822789626.704697
2020	1102388946.29849
2021	1357599987.53641
2022	723964243.644259