Year % (cumulative) 2006 98.4651641845703 2007 98.3239212036133 2008 98.5840606689453 2009 99.693359375 2010 99.7409515380859 2011 99.81787109375 2012 99.7562866210938 2013 99.7972717285156 2014 99.7952117919922 2015 98.1878967285156 2016 97.4847640991211 2017 99.7049713134766 2018 97.6777496337891 2019 97.7634811401367 2020 99.8003692626953 2021 99.7924728393555