Year % 2005 15.3788047958101 2006 12.8542369672912 2007 11.4165245837291 2008 11.6966326443551 2009 11.0303582106798 2010 10.300777641982 2011 10.6796686794882 2012 10.7193534298928 2013 10.5667508197075 2014 9.91784416428484 2015 10.1817930147926 2016 10.1853648011785 2017 9.82334580191848 2018 10.3249369000384 2019 10.2443720640152 2020 10.3789075399371 2021 10.5128570699218 2022 11.2473613143222