Year per 1,000 adults 2004 11.69 2005 17.98 2006 27.31 2007 65.35 2008 258.7 2009 275.71 2010 288.42 2011 295.55 2012 301.75 2013 314.83 2014 327.44 2015 338.45 2016 334.74 2017 340.52 2018 346.43 2019 349.93 2020 344.72 2021 343.53