Year Percent 2009 98.65606 2010 98.65606 2011 98.65606 2012 98.65606 2013 98.65606 2014 98.79248 2015 98.9289 2016 99.06532 2017 99.20174 2018 99.33816 2019 99.47459 2020 99.61101 2021 99.74743 2022 99.88385