Year Number 2004-01-01 44.74272931 2005-01-01 47.89029536 2006-01-01 45.15625000 2007-01-01 96.06440072 2008-01-01 65.38634322 2009-01-01 41.33099825 2010-01-01 56.51329839 2011-01-01 57.34137868 2012-01-01 49.74958264