Year Percent 1995-01-01 0.26350900000000000 1996-01-01 0.40460700000000000 1997-01-01 0.48340000000000000 1998-01-01 0.89477500000000000 1999-01-01 1.04879000000000000 2000-01-01 2.70129000000000000 2001-01-01 2.68460000000000000 2002-01-01 1.12946000000000010 2003-01-01 1.04294000000000000 2004-01-01 1.28332000000000000 2005-01-01 1.86333000000000000 2006-01-01 3.04429000000000000 2007-01-01 2.47867000000000000 2008-01-01 0.94321000000000000 2009-01-01 0.58896600000000000 2010-01-01 0.47417500000000000 2011-01-01 0.52341900000000000 2012-01-01 0.48293400000000003 2013-01-01 0.55158999999999990 2014-01-01 0.56705300000000000 2015-01-01 0.65812399999999990 2016-01-01 0.71340600000000000 2017-01-01 0.71446200000000000