Year	current US$
1990	1664830025.6729174
1991	4138359970.092778
1992	2534100026.85525
1993	1811910057.5447078
1994	2856520025.253296
1995	4606249889.37378
1996	2441979984.28345
1997	2047759986.8774407
1998	2719800010.6811547
1999	3112050014.4958477
2000	3312410030.3649936
2001	3387929992.6757817
2002	2539330001.831054
2003	3621069999.6948276
2004	4593440048.217776
2005	123459999.084473
2006	196509994.506836
2007	162910003.66210902
2008	241059997.55859402
2009	168830001.831055
2010	131550003.051758
2011	280000.001192093