Year per 100,000 adults 2004 35.01 2005 35.15 2006 35.35 2007 35.14 2008 34.99 2009 35.7 2010 34.49 2011 33.91 2012 33.32 2013 30.83 2014 29.51 2015 28.87 2016 29.57 2017 27.17 2018 26.67 2019 25.12 2020 21.38 2021 17.73