Year % 2001 8.26 2002 6.79 2003 7.92 2004 8.02 2005 8.19 2006 8.91 2007 7.47 2008 7.47 2009 8.21 2010 7.89 2011 7.94 2012 7.51 2013 7.5 2014 7.85 2015 8.64 2016 9.18 2017 13.03 2018 12.53 2019 9.63 2020 10.04 2021 9.12