Year % (cumulative) 2001 97.2563018798828 2007 99.1042556762695 2009 99.1441879272461 2010 99.540641784668 2011 99.222526550293 2012 99.5577011108398 2013 99.7346115112305 2015 99.3482818603516 2016 98.9367599487305 2017 99.2252807617188 2018 99.8455505371094 2019 99.8144836425781 2020 99.2012634277344 2021 99.7414169311523