Year % (cumulative) 2007 49.5457801818848 2009 48.2608108520508 2010 48.8911323547363 2011 45.4631004333496 2012 50.405101776123 2013 51.2977600097656 2015 49.1371383666992 2017 45.2496299743652 2018 24.8970355987549 2019 27.9621963500977 2020 44.959789276123 2021 29.2583923339844