Year % (cumulative) 1991 11.9173898696899 2004 80.5925903320312 2005 80.446891784668 2006 81.0616912841797 2007 77.4285736083984 2008 81.862419128418 2009 83.3791198730469 2010 83.370979309082 2011 84.0842437744141 2012 84.0762481689453 2013 84.3085098266602 2014 85.1405563354492 2015 86.363639831543 2016 86.6136474609375 2017 86.8991394042969 2018 86.562744140625 2019 86.5590515136719 2020 88.4278335571289 2021 89.1250991821289 2022 88.8830261230469