Year Percent 1998-01-01 47.5000 1999-01-01 37.5000 2000-01-01 34.6000 2001-01-01 34.6000 2002-01-01 34.6000 2003-01-01 34.6000 2004-01-01 34.6000 2005-01-01 146.5000 2006-01-01 92.5000 2007-01-01 72.2000 2008-01-01 18.5000 2009-01-01 29.7000 2010-01-01 34.2799 2011-01-01 36.1869 2012-01-01 32.9149 2013-01-01 29.1432 2014-01-01 27.3434 2015-01-01 49.7915 2016-01-01 42.2194