Year % 2001 51.48591406224917 2002 65.57633122352206 2003 50.02881401256632 2004 67.11969991950268 2005 77.20653777061418 2006 57.92716582279234 2007 43.35833249001384 2008 36.928710705283684 2009 27.796724684470085 2010 25.06168465266963 2011 23.625156968827262 2012 21.12946126686462 2013 24.096692414293802 2014 21.978164753259147 2015 22.100343914920398 2016 20.86479544695809 2017 21.83477281037235 2018 16.77935150079721 2019 16.95539494031241 2020 16.859145434132344 2021 17.19861902004111 2022 18.438090990326337 2023 25.444977612075405