Year % 1994 14.36 1999 16.3 2001 16.32 2002 16.25 2003 16.62 2004 16.62 2005 16.62 2006 16.62 2007 16.62 2008 9.88 2009 9.48 2010 9.1 2012 8.67 2013 8.62 2014 8.7 2015 8.69 2016 8.74 2017 8.74 2018 8.74 2019 8.75 2020 8.75 2021 8.75