Year per 1,000 adults 2008 332.9 2009 325.73 2010 354.09 2011 349.59 2012 351.33 2013 342.76 2014 351.23 2015 368.53 2016 376.9 2017 327.64 2018 323.1 2019 313.54 2020 297.07 2021 294.82