Year % 2001 16.744934600086154 2002 18.088060519482696 2003 13.008013857883224 2004 12.389507899359483 2005 11.889170689317655 2006 11.480240623795103 2007 12.406432967558507 2008 12.519272612608635 2009 16.03893431344326 2010 13.586914205771484 2011 14.870156062167435 2012 12.84702101420888 2013 14.564764776322134 2014 11.46941673578513 2015 13.749293761425264 2016 14.7281749980364 2017 12.646313699655199 2018 12.427385665734308 2019 15.466555391160073 2020 26.382624936753956 2021 14.509285704794403 2022 11.779052796722961 2023 14.747533159109203