Year % 2001 23.19821149643515 2002 20.90539408967748 2003 9.969895823332337 2004 8.084727336054577 2005 9.48625686975182 2006 15.76969447057374 2007 11.248654248451778 2008 8.149795600542413 2009 13.52320389262242 2010 13.128390732775642 2011 10.019464536731672 2012 14.290949092845558 2013 12.000654948670237 2014 16.552091012361647 2015 13.084411407155624 2016 14.28705038118426 2017 15.318537857203735 2018 14.656113288439757 2019 19.8778887135407 2020 21.374947258569076 2021 20.793825336411697 2022 17.302971026241906 2023 15.472605848930435