Year	US Dollars
1990	182456559314.17001
1991	207903893546.42599
1992	221354369330.73999
1993	227326347137.961
1994	225735998655.13702
1995	241468284029.64099
1996	245559681282.608
1997	264570393224.60495
1998	268664673288.04294
1999	259896557084.24402
2000	276445125755.96198
2001	290985158868.33893
2002	265664417270.67899
2003	250391707190.32803
2004	302858985632.64105
2005	351098789593.68195
2006	401508406840.59601
2007	455496799800.98297
2008	484878375651.22217
2009	468088002591.26074
2010	464747491141.729
2011	487696163869.79297
2012	523983136899.45203
2013	536703526171.98297
2014	536122708229.01892