Year Percent 2001-01-01 0.8006300000000001 2002-01-01 1.1834700000000000 2003-01-01 1.8428700000000000 2004-01-01 1.9685000000000000 2005-01-01 0.8934860000000001 2006-01-01 0.7682610000000000 2007-01-01 1.1867500000000000 2008-01-01 0.0799260000000000 2009-01-01 0.8637809999999999 2010-01-01 0.9080320000000000 2011-01-01 0.6552930000000000 2012-01-01 1.0958700000000001 2013-01-01 1.4300899999999999 2014-01-01 1.4118500000000000 2015-01-01 2.8592700000000000 2016-01-01 3.3760700000000000