Year % 2001 9.44766729871825 2002 12.74888263295918 2003 12.247103081177853 2004 12.791599200752765 2005 29.09506230067415 2006 35.295238960495155 2007 28.286579738286605 2008 16.742654145601378 2009 23.680903185725768 2010 17.147900247389842 2011 20.432960305806866 2012 16.83229515777765 2013 24.184488697786417 2014 20.474325842258693 2015 22.004801748282183 2016 22.317901925737715 2017 19.718946907412242 2018 19.564268478809467 2019 18.81382579793654 2020 18.278755970354617 2021 24.47825985580585 2022 21.52507864304759 2023 15.605455484624898