Year	current US$
1992	54675760.0111596
1993	68164482.7687619
1994	56890609.2633032
1995	106372326.955354
1996	104824638.065848
1997	89414094.4866851
1998	73454435.9130637
1999	77937824.3268497
2000	75745808.290742
2001	36430043.8781862
2002	6579787.53208812
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0