Year per 1,000 adults 2008 26.405 2009 27.945 2010 29.83 2011 34.89 2012 38.91 2013 42.23 2014 45.82 2015 43.64 2016 40.730000000000004 2017 42.505 2018 42.12 2019 63.144999999999996 2020 69.28999999999999 2021 81.9