Year % 1996 22.04 1999 21.64 2000 21.64 2001 13.51 2002 13.61 2003 13.59 2006 11.98 2007 13.44 2010 13.85 2011 13.85 2012 14.48 2013 14.48 2015 14.1 2016 14.44 2017 14.44 2018 14.44 2019 14.44 2020 14.44 2021 14.44