Year % (cumulative) 2009 11.1411695480347 2010 10.0403814315796 2011 10.3884983062744 2012 11.0854997634888 2013 10.4320268630981 2014 11.1157598495483 2015 10.6103296279907 2018 10.8443098068237 2019 10.1144695281982