Year % 2010 10.1013484732753 2011 11.4467110822484 2012 11.5528007091671 2013 10.2953314100547 2014 9.7016869901582 2015 12.2970549521794 2016 13.5465466235614 2017 12.4270657402459 2018 14.8202941618677 2019 14.7062901414394 2020 15.7854866930612 2021 14.0710328363883 2022 13.0335434836112