Year per 100,000 adults 2004 5.16 2005 5.27 2006 5.72 2007 5.97 2008 6.58 2009 7.64 2010 8.11 2011 14.71 2012 16.87 2013 17.64 2014 17.83 2015 17.64 2016 17.26 2017 16.75 2018 16.14 2019 15.64 2020 15.22 2021 15.8