Year % 2010 13.5082167685541 2011 18.047853036844 2012 21.1949876792055 2013 22.2438572106859 2014 21.4603340500502 2015 16.8424536921792 2016 16.5545127518585 2017 11.97172277931 2018 10.4273900688183 2019 7.97222983771095 2020 7.65009174813949 2021 5.39391025321323 2022 4.78957460572704