Year % (cumulative) 2007 47.1145210266113 2009 42.9949951171875 2010 43.2187957763672 2011 41.5997505187988 2012 45.171760559082 2013 44.8335952758789 2015 45.1430511474609 2017 41.3990783691406 2018 23.5364513397217 2019 26.9192008972168 2020 41.2915115356445 2021 27.7017383575439