Year % 2000 8.6 2001 8.8 2002 8.6 2003 9.3 2004 7.7 2005 8.4 2006 7.3 2007 7.6 2008 8.4 2009 9.1 2010 8.7 2011 9.7 2012 9.6 2013 9.3 2014 10 2015 9.5 2016 10 2017 9.9 2018 9.9 2019 9.6 2020 9.4 2021 9.5