Year Number 2005-01-01 5.9337 2006-01-01 7.2390 2007-01-01 9.1108 2008-01-01 11.7971 2009-01-01 14.9032 2010-01-01 20.7969 2011-01-01 25.8110 2012-01-01 32.6656 2013-01-01 38.9645 2014-01-01 54.9006 2015-01-01 61.8840 2016-01-01 67.9112