Year % 1993 24.87 2000 11.54 2001 11.87 2002 21.8 2003 12.9 2005 22.55 2006 22.86 2008 21.44 2009 23.22 2010 25.15 2011 21 2012 28.25 2013 24.88 2014 26.02 2015 30.42 2016 20.29 2018 25.18 2019 20.27 2020 24.71 2021 36.3