Year Percent 1996-01-01 22.222200000000000 1997-01-01 22.580600000000000 1998-01-01 22.222200000000000 1999-01-01 25.000000000000000 2000-01-01 24.444400000000000 2001-01-01 22.916700000000000 2002-01-01 23.076900000000000 2003-01-01 21.739100000000000 2004-01-01 20.000000000000000 2005-01-01 9.090910000000001 2006-01-01 9.523810000000001 2007-01-01 24.137900000000000 2008-01-01 24.324300000000000 2009-01-01 20.833300000000000 2010-01-01 20.289900000000000 2011-01-01 21.951200000000000 2012-01-01 27.272700000000000 2013-01-01 25.000000000000000 2014-01-01 25.000000000000000