Year % (cumulative) 1999 78.7516937255859 2007 85.1164398193359 2008 85.2701034545898 2009 85.3578796386719 2010 85.5237274169922 2011 85.5564575195312 2012 85.5167388916016 2013 85.4860000610352 2014 85.4531707763672 2015 85.3666381835938 2016 85.3639297485352 2017 85.0845108032227 2018 84.9439468383789 2019 84.8778915405273 2021 89.9099273681641 2022 92.655876159668 2023 91.0502319335938