Year % 2005 6.25246820199786 2006 5.15545411942603 2007 3.69085921286511 2008 2.87020628006279 2009 2.89219586768057 2010 2.31233314887669 2011 2.00668094304848 2012 1.67598753441661 2013 1.60618085839081 2014 1.97494771279186 2015 2.31686319973563 2016 2.77489855191291 2017 2.44404843529866 2018 2.20579865068329 2019 2.33935750447439 2020 2.64268448647727 2021 2.64057088343298 2022 2.14649051618116