Year Percent 1995-01-01 68.4545 1996-01-01 93.2121 1997-01-01 80.8928 1998-01-01 98.5715 1999-01-01 86.2034 2000-01-01 182.4230 2001-01-01 70.0082 2002-01-01 83.5726 2003-01-01 27.1582 2004-01-01 47.4544 2005-01-01 40.9416 2006-01-01 41.2021 2007-01-01 32.3787 2008-01-01 19.0245 2009-01-01 21.7472 2010-01-01 30.2988 2011-01-01 32.1923 2012-01-01 35.5578 2013-01-01 27.1296 2014-01-01 21.7813 2015-01-01 17.8397 2016-01-01 21.4501