Year	current US$
1979	4876816.75
1980	2732724.667
1981	1723712.802
1982	1724377.871
1983	1531510.83
1984	1491857.29
1985	1047562.838
1986	1336921.453
1987	1190326.095
1988	1484481.335
1989	1423378.706
1990	1327029.50949346
1991	1557928.65595548
1992	1615688.82812376
1993	1224023.50125122
1994	731127.319120626
2006	92348.2596177751
2007	545132.77022129
2008	634659.166117101
2009	556991.456175973
2010	1030968.4170388
2011	1200629.11285839
2012	1216064.72867935
2013	1284359.11175757
2014	1250194.73195231
2015	1027820.65999579
2016	1035283.88511129
2017	1071188.73579772
2018	1079297.74966465
2019	1029772.43083919
2020	1056088.02779608
2021	1198951.33016692
2022	1107973.94975524