Year Number 2005-01-01 327.7172 2006-01-01 342.3944 2007-01-01 371.1614 2008-01-01 481.5966 2009-01-01 519.0758 2010-01-01 568.2188 2011-01-01 663.0494 2012-01-01 626.8233 2013-01-01 665.6948 2014-01-01 773.8036 2015-01-01 816.2878 2016-01-01 839.6129