Year	current US$
1990	1664830025.6729174
1991	4138359970.092778
1992	2534090026.8554735
1993	1804770057.6782222
1994	2714990020.7519536
1995	4500429889.678956
1996	2226469989.7766137
1997	1952999984.7412102
1998	2675190010.070803
1999	3085840015.411375
2000	3240490028.381351
2001	3199939998.626709
2002	2390219997.406005
2003	3524169998.1689487
2004	4539830045.223239
2011	280000.001192093