Year % of population 2011 29.6769780620893 2012 29.8117274895065 2013 29.9452524440773 2014 30.0775522444434 2015 30.2086259214107 2016 30.3380145058316 2017 30.4660261567791 2018 30.5923531843541 2019 30.7168434063761 2020 30.8394963300283 2021 30.9601568246174 2022 31.0788286850691