Year	current US$
1988	19500000.774860427
1989	2999999.9962747092
1990	123179998.26371668
1991	107869997.38216409
1992	205360001.81175798
1993	226810006.17891592
1994	215269995.95575085
1995	112389998.69860706
1996	89529998.48686159
1997	103329997.61402607
1998	49009999.858215325
1999	65380000.71980058
2000	109650002.47023994
2001	73279997.91316693
2002	52119999.084621675
2003	60710000.12010336
2004	49180000.49516563
2005	65140002.012252785
2006	61230000.67286192
2007	141659997.54704532
2008	176840002.63549387
2009	97469998.97249043
2010	63489999.79533259
2011	20369999.073445708
2012	24269999.759271663
2013	-21050000.427290805
2014	2950000.2861022973
2015	-61820000.166073404
2016	-46230000.55551523
2017	-52639999.91305171
2018	-62960000.274702854
2019	-55350000.11697404
2020	-54400000.07860362
2021	-51960000.78134244
2022	-49050001.185387366