Year % 2010 10.3844713841228 2011 13.152331880037 2012 14.1280772011506 2013 19.087337952289 2014 19.1593570742527 2015 18.0602311442297 2016 16.0897752358952 2017 17.6941228680302 2018 15.0788751459618 2019 15.9197308599107 2020 13.8170337238636 2021 13.8533955288267 2022 14.0259134925082