Year Percent 1996-01-01 0.388709000000000000 1997-01-01 0.344742000000000000 1998-01-01 0.483998000000000000 1999-01-01 0.736504000000000000 2000-01-01 1.092170000000000000 2001-01-01 1.751859999999999800 2002-01-01 1.158160000000000000 2003-01-01 1.189900000000000000 2004-01-01 0.569398000000000000 2005-01-01 0.110831000000000000 2006-01-01 0.059217999999999990 2007-01-01 0.068797000000000000 2008-01-01 0.040590000000000000 2009-01-01 0.051594000000000010 2010-01-01 0.056792999999999996 2011-01-01 0.068028999999999990 2012-01-01 0.085541999999999990 2013-01-01 0.126730999999999980 2014-01-01 0.150995000000000020 2015-01-01 0.157144000000000000 2016-01-01 0.251349000000000000