Year	current US$
1991	3960000.03814697
1992	93849998.4741211
1993	62200000.762939505
1994	71430000.3051758
1995	179130004.882813
1996	90720001.2207031
1997	103580001.831055
1998	130130004.882813
1999	132399993.896484
2000	97819999.6948242
2001	130229995.727539
2002	132210006.713867
2003	370880004.88281304
2004	249380004.882813