Year	current US$
1990	244744488.1216886
1991	310657785.1790175
1992	302331390.5079101
1993	406328059.95004165
1994	250791007.49375522
1995	50162962.96296296
1996	25823771.568713322
1997	26962103.634957463
1998	0
1999	0