Year % 1995 15.12 1998 14.16 2000 13.18 2001 15.05 2002 13.49 2003 15.69 2004 15.69 2005 15.37 2007 13.96 2008 14.3 2009 14.41 2010 14.6 2011 14.79 2012 15.44 2013 14.53 2015 13.98 2016 16.81 2019 14.15