Year % (cumulative) 2007 10.7756700515747 2008 10.650369644165 2009 10.7686500549316 2010 11.0251502990723 2011 10.8315401077271 2012 12.0821895599365 2013 12.7005701065063 2014 11.8888397216797 2015 14.1698503494263 2016 14.0110702514648 2017 15.0670700073242 2020 14.9134101867676 2021 15.6315803527832 2022 15.0970802307129