Year % 2010 6.86702975926534 2011 6.03201397638731 2012 5.37615761868223 2013 4.52530200889505 2014 3.85059424062382 2015 3.99835180405115 2016 4.7488988110068 2017 3.66101354771918 2018 3.92063262802426 2019 3.89949874723607 2020 3.8727769630135 2021 3.11444658852587 2022 2.81875346844338