Year % (cumulative) 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 12.7220468521118 2015 12.6817836761475 2016 12.7513236999512 2017 16.9414920806885 2018 17.8011474609375 2019 16.151819229126 2020 16.8670806884766 2021 15.4466695785522 2022 15.9464864730835