Year % 2001 5.801915675006529 2002 7.712289103723531 2003 7.3086620565996405 2004 5.972537954124977 2005 5.1937556920945624 2006 6.769915164027955 2007 8.27166959008924 2008 8.40787171717855 2009 10.46037818866809 2010 12.497352921366138 2011 10.357056891151032 2012 9.856242203580269 2013 9.115437400198525 2014 10.55011731529815 2015 11.793758508977795 2016 12.86098951959156 2017 11.730418265071778 2018 14.271906342134633 2019 21.332758231991512 2020 23.75547113294275 2021 20.793825336411697 2022 15.665257513313119 2023 15.472605848930435