Year % 2010 3.14187854787213 2011 2.29438855572052 2012 2.22469008934459 2013 2.30267771735677 2014 1.62133907710753 2015 1.59273995602263 2016 2.13063064162181 2017 2.07247749965176 2018 1.9896209372896 2019 1.55383992990017 2020 1.81862542623632 2021 1.74496152207977 2022 2.71411100292446