Year per 1,000 adults 2004 87.58 2005 90.09 2006 91.17 2007 87.15 2008 87.24 2009 86.56 2010 87.66 2011 89.22 2012 87.59 2013 81.31 2014 76.48 2015 83.71 2016 81.35 2017 83.1 2018 83.09 2019 82.92 2020 83.04 2021 83.98