Year % 2001 7.15 2002 7.94 2004 7.2 2005 7.34 2006 7.32 2007 7.27 2008 7.24 2009 7.04 2010 7.77 2011 7.31 2012 7.01 2013 4.59 2014 7.03 2015 7.61 2016 8.34 2017 4.07 2018 3.21 2019 8.19 2020 7.69 2021 7.79