Year % 2001 19.229377304290786 2002 22.6839690949096 2003 17.337611782366917 2004 17.3791192732543 2005 14.301346340037632 2006 11.23813256018296 2007 14.345893701514154 2008 17.192778101339545 2009 13.691288998799358 2010 11.931203284682942 2011 7.587233515382831 2012 5.848507397474997 2013 5.038182363860699 2014 5.344850219223398 2015 6.007560791377356 2016 5.331949222069558 2017 6.995234824998911 2018 4.4902786767758816 2019 4.606836430969143 2020 9.003214244307236 2021 9.526597579141624 2022 4.914501816165859 2023 4.481398502605746