Year	2010 U.S. Dollars
1999-01-01	8782.82624669327
2000-01-01	8967.24745280595
2001-01-01	8671.83645416692
2002-01-01	8453.58471619258
2003-01-01	9403.45364734458
2004-01-01	9670.08454821137
2005-01-01	10653.78439943070
2006-01-01	11175.12987034950
2007-01-01	11707.98539668750
2008-01-01	11856.02054169730
2009-01-01	11631.71900771530
2010-01-01	12120.56216920620
2011-01-01	4578.53181475550
2012-01-01	10208.67460930650
2013-01-01	8823.55195287948
2014-01-01	6697.10327851270
2015-01-01	6073.40620029268
2016-01-01	5848.93736052847
2017-01-01	7314.62439550180