Year % of population 2010 17.55816355030757 2011 17.94501578409038 2012 22.06453681187153 2013 21.86012741172752 2014 21.147423799610962 2015 20.860611634040993 2016 21.41412939064809 2017 21.570958889056268 2018 20.223112974343653 2019 20.459455617333727 2020 20.676459515444407 2021 20.87889071590245 2022 21.135077355864492