Year % (cumulative) 2011 1.6816999912262 2012 1.72565996646881 2013 1.96670997142792 2014 2.05821990966797 2015 3.32593989372253 2016 3.48118996620178 2017 3.79243993759155 2018 4.01797008514404 2019 4.26195001602173 2021 3.37399005889893