Year % 2012 12.0253120760801 2013 13.5641229127859 2014 18.6594879669541 2015 13.7803938893243 2016 10.3660058174987 2017 10.1313764663331 2018 16.1826855901098 2019 15.6547053123274 2020 16.0896174795028 2021 16.0884827108197 2022 16.2934964614722 2023 16.3616880968054