Year % 2001 10.29 2002 6.96 2003 7.47 2005 7.71 2006 7.22 2007 8.26 2008 6.1 2009 6.16 2010 6.16 2011 6.16 2012 6.16 2014 6.47 2016 6.63 2018 7.55 2020 7.55 2021 7.92