Year % 2007 10.77 2008 10.77 2009 10.77 2010 10.77 2012 10.78 2013 10.78 2014 10.78 2015 10.78 2016 10.78 2017 10.78 2018 10.78 2019 10.78 2020 10.78 2021 10.78