Year per 1,000 adults 2008 8.58 2009 12.54 2010 16.71 2011 17.94 2012 20.14 2013 48.09 2014 56.13 2015 63.77 2016 34.42 2017 41.2 2018 23.16 2019 25.6 2021 48.16