Year Percent 1995-01-01 11.021400000000000 1996-01-01 10.367800000000000 1997-01-01 27.211200000000000 1998-01-01 20.548200000000000 1999-01-01 23.417600000000000 2000-01-01 20.448300000000000 2001-01-01 22.639100000000000 2002-01-01 13.774600000000000 2003-01-01 12.240000000000000 2004-01-01 16.063600000000000 2005-01-01 10.470400000000000 2006-01-01 17.376300000000000 2007-01-01 11.420300000000000 2008-01-01 7.958850000000000 2009-01-01 1.823100000000000 2010-01-01 3.226580000000000 2011-01-01 2.098830000000000 2012-01-01 5.492020000000000 2013-01-01 5.386819999999999 2014-01-01 3.256410000000000 2015-01-01 1.701470000000000 2016-01-01 1.039100000000000