Year Percent 2000-01-01 0.10091599999999999 2001-01-01 1.66670000000000000 2002-01-01 1.78325999999999980 2003-01-01 2.06699000000000000 2004-01-01 1.76419000000000010 2005-01-01 4.32562000000000000 2006-01-01 3.81340999999999970 2007-01-01 4.46401000000000000 2008-01-01 3.61447000000000000 2009-01-01 3.19260000000000000 2010-01-01 3.49482000000000000 2011-01-01 2.02288000000000000 2012-01-01 1.57833000000000000 2013-01-01 2.79323000000000000 2014-01-01 1.61372999999999990 2015-01-01 1.75772000000000020 2016-01-01 2.76306000000000000