Year % 2001 11.198144539827009 2002 8.346788187149189 2003 8.776912986445124 2004 9.017532824907619 2005 10.103308042132614 2006 12.296567158895586 2007 10.444518439784769 2008 11.734767866284256 2009 13.787269057459191 2010 13.119357424188033 2011 15.225566913124583 2012 17.754704835616348 2013 21.064919078129755 2014 26.38152071781283 2015 32.09348633798608 2016 31.15515639516878 2017 24.578125098222696 2018 19.46462755460626 2019 19.69985523238745 2020 24.106694918123836 2021 23.407985076767783 2022 26.237892521425763 2023 24.692683333190555