Year Percent 2000-01-01 0.777 2001-01-01 0.657 2002-01-01 0.726 2003-01-01 0.285 2004-01-01 0.285 2005-01-01 0.285 2006-01-01 1.590 2007-01-01 3.260 2008-01-01 1.310 2009-01-01 1.380 2010-01-01 1.310 2011-01-01 1.410 2012-01-01 1.470 2013-01-01 1.570 2014-01-01 1.670 2015-01-01 1.560 2016-01-01 1.930