Year Percent 1997-01-01 -0.2071610000000000 1998-01-01 -1.7017600000000000 1999-01-01 -0.6250899999999999 2000-01-01 0.4437830000000000 2001-01-01 0.7639600000000001 2002-01-01 1.3677700000000002 2003-01-01 1.5122400000000000 2004-01-01 1.4641899999999999 2005-01-01 1.4857500000000000 2006-01-01 1.4877700000000000 2007-01-01 1.6361800000000000 2008-01-01 1.2845300000000000 2009-01-01 1.8052900000000000 2010-01-01 1.5286300000000000 2011-01-01 1.3266100000000000 2012-01-01 1.6636400000000002 2013-01-01 1.4188600000000000 2014-01-01 1.2586500000000000 2015-01-01 1.3184200000000001 2016-01-01 1.4224700000000001