Year % 2007 92.63 2008 91.8 2009 91.8 2010 91.8 2012 79.88 2013 79.88 2014 79.88 2015 79.88 2016 79.88 2017 79.88 2018 80.26 2019 80.2 2020 80.2 2021 80.2