Year % 1993 9.24 1998 17.09 1999 12 2000 13.83 2002 8.96 2003 9.39 2004 9.51 2005 9.35 2006 11.59 2007 11.62 2008 917.75 2009 11.18 2010 11.13 2011 11.08 2012 10.9 2013 13.75 2014 8.08 2015 11.35 2016 12.26 2018 11.14 2019 12.97 2020 11.45 2021 11.39