Year	US Dollars
1990	1571589168.28466
1991	1563230537.14143
1992	1586229216.53057
1993	1672702103.37249
1994	1718540526.04645
1995	1831577718.327
2007	4872520055.27443
2008	4882207155.89004
2009	4492564319.14663
2010	4487559256.41573
2011	4397668042.07143
2012	4350575556.86814
2013	4333585301.68757