Year % (cumulative) 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 12.2164363861084 2015 12.4502811431885 2016 12.6355695724487 2017 12.914571762085 2018 13.0335903167725 2019 14.1389865875244 2020 14.474160194397 2021 15.1223907470703 2022 15.2110443115234