Year Percent Change 2002-01-01 2.2035 2003-01-01 5.0789 2004-01-01 7.2013 2005-01-01 6.8213 2006-01-01 7.6503 2007-01-01 10.1645 2008-01-01 17.8541 2009-01-01 8.2052 2010-01-01 6.4783 2011-01-01 8.0483 2012-01-01 5.5506 2013-01-01 4.3194 2014-01-01 6.7067 2015-01-01 4.2000 2016-01-01 5.0000 2017-01-01 5.4000 2018-01-01 5.7000 2019-01-01 5.7000