Year	current US$
1992	20979866.2445418
1993	19046416.5362309
1994	19219070.3850716
1995	20835000.8518516
1996	22979665.7448133
1997	22153935.2412881
1998	24141805.6999325
1999	20074307.524606
2000	24121377.2253432
2001	24443776.4674747
2002	23839399.6076455
2003	28922304.311978
2004	36413410.3666978
2005	34745069.941328
2006	37899382.634472
2007	39876891.5974015
2008	44991988.0982369
2009	55852252.8789652
2010	45388366.5558913
2011	52767808.2332354