Year per 100,000 adults 2004 23.57 2005 23.52 2006 23.78 2007 23.59 2008 23.95 2009 22.96 2010 22.5 2011 21.7 2012 21.81 2013 21.54 2014 21.11 2015 19.32 2016 17.54 2017 16.17 2018 14.91 2019 16.42 2020 13.8 2021 11.41