Year % (cumulative) 1992 88.5189514160156 2004 93.0559005737305 2005 94.8896026611328 2006 95.7995986938477 2007 95.7420196533203 2008 95.3219223022461 2009 95.4420394897461 2010 95.8535766601562 2011 96.7958679199219 2012 96.1369171142578 2013 96.610481262207 2014 96.2345123291016 2015 96.0775985717773 2016 96.7928466796875 2017 97.1618118286133 2018 97.048698425293 2019 96.8714828491211 2020 97.5043487548828 2021 97.9654235839844 2022 98.4479675292969