Year Percent 1995-01-01 1.7657599999999998 1996-01-01 12.4161000000000000 1997-01-01 9.2619600000000000 1998-01-01 8.8147399999999990 1999-01-01 1.8089200000000000 2000-01-01 5.0508500000000000 2001-01-01 3.7796300000000005 2002-01-01 4.3292699999999990 2003-01-01 4.8003500000000000 2004-01-01 2.1895000000000000 2005-01-01 3.2893600000000000 2006-01-01 1.7978599999999998 2007-01-01 3.2418099999999996 2008-01-01 1.2914900000000000 2009-01-01 1.7489700000000001 2010-01-01 4.0343599999999995 2011-01-01 3.1357100000000000 2012-01-01 3.0620100000000000 2013-01-01 3.3761500000000000