Year Percent Change 2001-01-01 11.5385 2002-01-01 15.8267 2003-01-01 15.5725 2004-01-01 15.3236 2005-01-01 10.2520 2006-01-01 12.0000 2007-01-01 18.4137 2008-01-01 25.3036 2009-01-01 10.8159 2010-01-01 12.2990 2011-01-01 21.5273 2012-01-01 30.5705 2013-01-01 34.7000 2014-01-01 15.5600 2015-01-01 11.9190 2016-01-01 9.0504 2017-01-01 9.8851 2018-01-01 12.0974 2019-01-01 11.4731