Year % (cumulative) 2014 13.2726097106934 2015 14.4350099563599 2016 14.6544303894043 2017 15.3223104476929 2018 15.3773508071899 2019 16.236400604248 2020 17.5930786132812 2021 18.0918121337891 2022 17.1879081726074