Year % (cumulative) 1989 97.0566177368164 2000 99.1209411621094 2014 99.86669921875 2015 99.8266830444336 2016 99.8179702758789 2017 99.7764205932617 2018 99.7979965209961 2019 99.7905120849609 2020 99.8205032348633 2021 99.8661193847656 2022 99.9087219238281