Year % 2012 20.9246965468261 2013 17.2177008857091 2014 17.4741516990976 2015 13.6444441557489 2016 10.4501249559317 2017 9.66474950293597 2018 8.89557749634421 2019 9.35251965598566 2020 8.16490589713527 2021 6.72906961253746 2022 5.94090043984901