Year Number 2005-01-01 75.2159 2006-01-01 128.7174 2007-01-01 172.6933 2008-01-01 239.5248 2009-01-01 289.0916 2010-01-01 344.3732 2011-01-01 387.9863 2012-01-01 450.7241 2013-01-01 529.3748 2014-01-01 612.6671