Year	current US$
1990	13680000.3051758
1991	231000000
1992	129820007.324219
1993	99150001.5258789
1994	148270004.272461
1995	147380004.882813
1996	128529998.779297
1997	115139999.38964799
1998	447829986.57226604
1999	317989990.234375
2000	437369995.11718804
2001	313779998.779297
2002	159770004.272461
2003	263269989.013672
2004	278660003.66210896