Year % 2002 14.3 2004 12.81 2005 13.12 2006 13.12 2008 15.78 2009 15.78 2010 15.45 2011 14.59 2012 12.98 2013 13.87 2014 15.25 2015 17.61 2016 17.61 2018 9 2019 9.48 2020 14.18 2021 20.25