Year Percent 1999-01-01 0.11688399999999999 2000-01-01 0.13445300000000000 2001-01-01 0.07676700000000000 2002-01-01 1.60882000000000010 2003-01-01 0.63450900000000000 2004-01-01 0.00312800000000000 2005-01-01 0.17653100000000000 2006-01-01 0.13676400000000000 2007-01-01 0.58958700000000000 2008-01-01 0.59030799999999990 2009-01-01 0.73385600000000010 2010-01-01 0.74241800000000000 2011-01-01 2.08540000000000000 2012-01-01 2.10832000000000000 2013-01-01 1.90149000000000010 2014-01-01 2.53197000000000030