Year % 2001 7.46 2006 8.88 2007 8.61 2008 8.28 2009 8.73 2010 8.16 2011 7.8 2012 7.78 2013 7.77 2014 7.86 2015 8.07 2016 8.18 2017 8.08 2018 8.77 2019 52.14 2020 8.74 2021 8.44