Year % 2001 7.170802852115937 2002 8.290344432285968 2003 13.735053103260467 2004 12.09194734603695 2005 18.66268744163905 2006 18.600728849802728 2007 24.381551737495457 2008 21.257436561576753 2009 21.271622236160603 2010 24.947633017315116 2011 26.589863235090895 2012 24.756073530910548 2013 22.134774058965302 2014 24.05450678741069 2015 20.969494534385813 2016 23.80880867856007 2017 22.405914540678456 2018 24.35423145522508 2019 29.117858361965148 2020 25.176453216268612 2021 24.701297300901633 2022 24.280371786523073 2023 28.54186493040315