Year Percent 1999-01-01 0.2733500000000000 2000-01-01 0.6029909999999999 2001-01-01 0.6891689999999999 2002-01-01 0.4129550000000000 2003-01-01 0.2330390000000000 2004-01-01 0.2303770000000000 2005-01-01 0.4969850000000000 2006-01-01 0.8493149999999999 2007-01-01 1.0886400000000000 2008-01-01 1.2683600000000000 2009-01-01 1.0316700000000000 2010-01-01 2.0112500000000000 2011-01-01 1.2603200000000000 2012-01-01 0.5123920000000000 2013-01-01 0.2599810000000000 2014-01-01 0.1334600000000000