Year Number 2005-01-01 219.6139 2006-01-01 304.4629 2007-01-01 347.8675 2008-01-01 402.6221 2009-01-01 424.0722 2010-01-01 476.1967 2011-01-01 482.5944 2012-01-01 560.8046 2013-01-01 567.4547 2014-01-01 564.5625 2015-01-01 521.9123 2016-01-01 468.5711 2017-01-01 546.3803