Year Number 2006-01-01 9.3358 2007-01-01 9.7371 2008-01-01 29.4746 2009-01-01 41.5026 2010-01-01 49.1773 2011-01-01 50.4866 2012-01-01 48.5259 2013-01-01 52.0684 2014-01-01 54.6516 2015-01-01 55.7766 2016-01-01 64.4138