Year Percent 1994 76.89024 1995 126.67242 1996 137.94516 1997 162.1751 1998 98.85415 1999 124.52058 2000 169.65888 2001 123.80016 2002 119.48109 2003 107.97069 2004 101.44745 2005 96.82918 2006 110.29469 2007 105.47124 2008 90.69938 2009 71.89302 2010 68.27505 2011 68.41918 2012 67.31123 2013 62.45096 2014 57.10831 2015 55.08662 2016 56.53328 2017 54.57827