Year % 2011 26.5060240963855 2012 26.5060240963855 2013 26.5060240963855 2014 26.5060240963855 2015 26.5060240963855 2016 28.4595300261097 2017 28.4595300261097 2018 28.4595300261097 2019 28.4595300261097 2020 28.4595300261097 2021 32.3636363636364 2022 32.3636363636364 2023 32.3636363636364