Year per 100,000 adults 2004 0.38 2005 0.37 2006 0.36 2007 0.36 2008 0.49 2009 0.56 2010 0.62 2011 0.68 2012 0.65 2013 0.88 2014 0.96 2015 0.98 2016 1 2017 1.01 2018 0.95 2019 0.85 2020 0.86 2021 0.85