Year % of total population ages 15+ (national estimate) 1986 75.46 1997 72.88 2004 77.05 2006 80.39 2007 85.15 2008 87.38 2009 87.72 2010 86.99 2011 86.74 2012 86.54 2013 84.22 2014 87.32 2015 88.19 2016 91.81 2017 88.05 2018 87.34 2019 88.1 2020 87.98 2021 87.4 2022 87.43