Year % 2013 9.03010629233429 2014 8.63858208754202 2015 8.50414915043759 2016 8.43293181898779 2017 9.96740143915543 2018 10.8699174836197 2019 12.6962225222711 2020 12.3484416115374 2021 13.1271987787708