Year % 2007 0.226516077373678 2008 0.409453887918507 2009 0.56999382899243 2010 0.505748742041625 2011 0.456371196024312 2012 0.445132847109478 2013 0.440752731540527 2014 0.847591074961831 2015 0.93246083066103 2016 1.04758761475179 2017 0.72626236804278 2018 0.950566178824407 2019 1.5073192904517 2020 1.45017555342117 2021 1.47082760274416 2022 1.35188387148659