Year	current US$
1991	15369999.8855591
1992	104370002.746582
1993	42310001.373291
1994	43810001.373291
1995	58049999.237060495
1996	67269999.02725224
1997	114030004.85897064
1998	151109997.1234798
1999	156170004.4870376
2000	126270003.19957733
2001	129900000.9000302
2002	96569999.81403351
2003	116970003.33666804
2004	210359993.45779395
2021	50000.0007450581