Year Percent 2011 0.017 2012 0.017 2013 0.016 2014 0.016 2015 0.016 2016 0.016 2017 0.016 2018 0.016 2019 0.016 2020 0.016 2021 0.016 2022 0.016 2023 0.016 2024 0.016