Year Percent 1995-01-01 88.7987 1996-01-01 86.4035 1997-01-01 79.3233 1998-01-01 79.3233 1999-01-01 71.2987 2000-01-01 63.0265 2001-01-01 59.8421 2002-01-01 74.0399 2003-01-01 89.3217 2004-01-01 97.3577 2005-01-01 89.5845 2006-01-01 106.0310 2007-01-01 133.4040 2008-01-01 83.7393 2009-01-01 75.8237 2010-01-01 73.0937 2011-01-01 62.7386 2012-01-01 56.6963 2013-01-01 52.8601 2014-01-01 40.1290 2015-01-01 40.6226 2016-01-01 37.7972