Year Number 2004-01-01 80.2458 2005-01-01 57.4325 2006-01-01 63.0075 2007-01-01 71.7779 2008-01-01 209.7061 2009-01-01 193.8828 2010-01-01 156.1245 2011-01-01 154.6009 2012-01-01 154.3735 2013-01-01 165.3828 2014-01-01 244.7002 2015-01-01 232.3951 2016-01-01 216.5707