Year % (cumulative) 1981 7.59999990463257 1991 8.69999980926514 2014 22.1860599517822 2015 22.929069519043 2016 20.1387195587158 2017 23.5572547912598 2018 24.1726455688477 2019 24.4034461975098 2020 26.0435390472412 2021 28.1758575439453 2022 28.9304580688477