Year	current US$
1990	1630290001.209827
1991	4118049968.8666315
1992	2515919972.1142645
1993	1799839997.261763
1994	2757710002.1000957
1995	4568480105.917901
1996	2396509991.9941278
1997	1998610008.4502258
1998	2656909991.3425756
1999	3061409980.049357
2000	3265560003.222897
2001	3334479997.528718
2002	2483939992.701635
2003	3540949971.4635305
2004	4530900025.39382
2005	114099998.96399675
2006	190499997.23024645
2007	156770001.68524677
2008	235310004.83781147
2009	165430002.3280082
2010	146259999.95507252
2011	280000.001192093