Year % (cumulative) 1978 3.38446998596191 2012 15.39391040802 2014 15.120849609375 2015 14.9390802383423 2017 22.6803760528564 2018 16.1298904418945 2019 23.872163772583 2020 18.7398796081543 2021 26.0230960845947 2022 20.4559993743896