Year % 2001 18.62281273868543 2002 14.287659639237397 2003 4.944775511347058 2004 2.8208689826100306 2005 4.911517716711362 2006 6.921942782467844 2007 6.798604918490092 2008 2.932909642649102 2009 6.640774446104142 2010 8.504189587038777 2011 10.636091451249063 2012 12.098444603419127 2013 13.690073426075902 2014 13.817488011438439 2015 10.439926859789583 2016 10.059698663189746 2017 10.001252606200913 2018 11.707240299632621 2019 11.890416364427761 2020 15.281690917861571 2021 12.067342534186281 2022 10.602176061763844 2023 10.460493661520974