Year % 2010 12.3854799314985 2011 10.8959316437067 2012 10.0320057605494 2013 9.76841031506305 2014 10.0371981908106 2015 9.0321877054387 2016 8.53922465882503 2017 10.578473273249 2018 10.3284698283102 2019 16.6576098282181 2020 13.1495847350433 2021 13.1762825696463 2022 12.1767268955231