Year Number 2004-01-01 57.57612571 2005-01-01 81.15404103 2006-01-01 64.62231170 2007-01-01 50.16361637 2008-01-01 50.87626997 2009-01-01 52.00308457 2010-01-01 52.68167160 2011-01-01 123.64231560 2012-01-01 100.27026390 2013-01-01 104.53770040 2014-01-01 39.25597483