Year % 2005 9.24977263724113 2006 8.81033399559022 2007 8.85835629974667 2008 8.58269638340699 2009 8.54702664573378 2010 7.23503359658627 2011 6.86815902450533 2012 7.2475325307913 2013 10.1560460352012 2014 9.99137338188928 2015 9.43509134768433 2016 8.86871247168992 2017 10.1924279555023 2018 8.64866000515038 2019 9.72634066738099 2020 12.4102181705815 2021 12.983902466712 2022 14.6372274643709