Year Number 2004-01-01 27.8842 2005-01-01 26.8248 2006-01-01 25.8942 2007-01-01 24.7871 2008-01-01 32.3030 2009-01-01 25.3400 2010-01-01 22.8900 2011-01-01 1020.6770 2012-01-01 989.4121 2013-01-01 943.8125 2014-01-01 1273.3896 2015-01-01 1073.5532 2016-01-01 1116.3386