Year per 1,000 adults 2004 34.29 2005 33.29 2006 48.96 2007 52.03 2008 51.3 2009 50.37 2010 50.02 2011 152.48 2012 205.45 2013 270.17 2014 259.01 2015 251.04 2016 317.29 2017 312.96 2018 301.82 2019 316.49 2020 294.15 2021 335.26