Year Percent 1996-01-01 6.605020000000000 1997-01-01 8.913440000000000 1998-01-01 10.364200000000000 1999-01-01 14.870400000000000 2000-01-01 2.276810000000000 2001-01-01 11.088800000000000 2002-01-01 22.098100000000000 2003-01-01 20.381300000000000 2004-01-01 22.726600000000000 2005-01-01 16.659500000000000 2006-01-01 16.776000000000000 2007-01-01 14.225999999999999 2008-01-01 2.124910000000000 2009-01-01 13.445400000000000 2010-01-01 10.526300000000000 2011-01-01 5.693950000000000 2012-01-01 14.265800000000000 2013-01-01 7.933820000000000 2014-01-01 12.675000000000000 2015-01-01 10.009800000000000 2016-01-01 12.437400000000000