Year Percent 1992-01-01 0.030397000000000004 1993-01-01 0.024794000000000000 1994-01-01 0.030253000000000000 1995-01-01 0.033075000000000000 1996-01-01 0.029999000000000000 1997-01-01 0.049446000000000000 1998-01-01 0.069138000000000000 1999-01-01 0.070406000000000000 2000-01-01 0.103563000000000020 2001-01-01 0.084671000000000010 2002-01-01 0.096326000000000000 2003-01-01 0.091229999999999990 2004-01-01 0.072431000000000000 2005-01-01 0.077541000000000000 2006-01-01 0.073228000000000000 2007-01-01 0.066304999999999990 2008-01-01 0.063033000000000000 2009-01-01 0.089626000000000000 2010-01-01 0.108155000000000000 2011-01-01 0.107406000000000000 2012-01-01 0.139580999999999980 2013-01-01 0.148800000000000000 2014-01-01 0.167502999999999990 2015-01-01 0.198125000000000000