Year Number 2008-01-01 332.8613 2009-01-01 325.6978 2010-01-01 354.0918 2011-01-01 349.6629 2012-01-01 351.5878 2013-01-01 343.1909 2014-01-01 351.6784 2015-01-01 368.6873 2016-01-01 376.7852