Year Percent 2000-01-01 25.64994 2001-01-01 21.95796 2002-01-01 12.58953 2003-01-01 17.43333 2004-01-01 20.70914 2005-01-01 24.34145 2006-01-01 22.06419 2007-01-01 23.42672 2008-01-01 30.23693 2009-01-01 32.63487 2010-01-01 43.31450