Year % 2002 8.44 2004 6.16 2005 7.08 2006 7.08 2008 9.17 2009 9.15 2010 9.23 2011 8.36 2012 7.61 2013 7.52 2014 10.3 2015 9.38 2016 9.38 2018 7.68 2019 6.52 2020 9.23 2021 11.33