Year % (cumulative) 1981 4.90000009536743 2014 20.8325691223145 2015 22.0801601409912 2016 19.7122898101807 2017 23.7866859436035 2018 24.1539192199707 2019 24.4724769592285 2020 25.3812408447266 2021 27.3331069946289 2022 28.3811092376709