Year % (cumulative) 2005 0.294794321060181 2006 0.219272270798683 2007 0.194114089012146 2008 0.226625338196754 2009 0.2191481590271 2010 0.283986866474152 2011 0.340555936098099 2012 0.246445879340172 2013 0.302609115839005 2014 0.302863925695419 2015 0.448389261960983 2016 0.572376132011414 2017 0.529102325439453 2018 0.461597979068756 2019 0.397351771593094