Year % 2006 7.76759647374961 2007 7.59844455870216 2008 5.59879211346277 2009 5.22061861150825 2010 3.88785784505743 2011 2.93261853635558 2012 2.43018679665442 2013 2.30382713124504 2014 2.305232984074 2015 2.6828308673521 2016 2.98569607594999 2017 3.07080205891804 2020 3.23248100828432 2021 3.10718391598903 2022 2.84125651121101