Year % 2001 8.26 2002 6.79 2003 7.92 2004 8.02 2005 8.19 2006 8.48 2007 7.01 2008 7.01 2009 7.72 2010 7.6 2011 7.4 2012 6.93 2013 6.93 2014 7.38 2015 7.92 2016 8.04 2017 13.03 2018 12.05 2019 8.48 2020 8.41 2021 7.98