Year % 1994 13.7 1995 14.49 2001 13.49 2002 13.9 2003 14.27 2004 14.27 2005 14.45 2006 13.81 2007 13.01 2008 13 2009 11.58 2010 13 2011 12.65 2012 11.7 2013 12.99 2014 12.7 2019 15.46