Year % 1995 13.16 1997 13.16 2001 15.6 2002 14.96 2003 29.82 2004 29.82 2005 29.84 2006 29.83 2007 14.07 2008 14.07 2009 14.07 2010 14.07 2011 12.98 2012 15.13 2013 16.77 2015 16.69 2016 16.69 2017 16.69