Year Percent 1994 1.01508 2003 0.99931 2005 0.99311 2006 0.99121 2007 0.98807 2008 0.98514 2009 0.99078 2011 0.99192 2012 0.99163 2013 0.99307 2014 0.99024 2015 0.99041 2016 0.99307