Year % (cumulative) 2013 20.9441699981689 2014 20.6057891845703 2015 21.5686492919922 2016 21.2356300354004 2017 21.4364643096924 2018 22.7407932281494 2019 24.2476978302002 2020 25.6193103790283 2021 27.7006206512451 2022 28.0614147186279