Year % (cumulative) 2001 9.22838973999023 2002 10.5153322219849 2005 10.3954601287842 2008 11.7073497772217 2011 12.5238599777222 2012 13.4587697982788 2013 13.2526922225952 2014 13.7770109176636 2015 14.9690341949463 2016 14.3189640045166 2017 15.3708934783936 2018 16.1510696411133 2019 16.5862274169922