Year Number 2004-01-01 859.8542400 2005-01-01 678.9269009 2006-01-01 493.6518588 2007-01-01 595.0764864 2008-01-01 749.8308114 2009-01-01 1449.8707590 2010-01-01 1219.5988990 2011-01-01 1409.5667440 2012-01-01 1531.0626310 2013-01-01 1575.5359890 2014-01-01 1906.0412190