Year % 1995 100 1996 99.58833 1998 99.96186 1999 99.83478 2000 99.77486 2001 99.67286 2002 99.31541 2003 99.39158 2004 99.26787 2005 98.71684 2006 99.22122 2007 99.05116 2008 99.33265 2009 99.23693 2010 98.80052 2011 99.39431 2012 99.30393 2013 99.26737 2014 99.51795 2015 99.7004 2016 99.21346