Year % (cumulative) 1991 61.0101013183594 2006 98.8089294433594 2007 98.7521438598633 2008 99.0199813842773 2009 98.9797744750977 2010 98.9812469482422 2011 99.0471878051758 2012 99.3027725219727 2013 99.2826919555664 2014 99.3442611694336 2015 99.2700729370117 2016 99.3035583496094 2017 99.2805023193359 2018 99.2685623168945 2019 99.0162200927734 2020 99.0944366455078 2021 99.1430282592773 2022 99.2231140136719