Year per 1,000 adults 2007 74.65 2008 160.73 2009 138.615 2010 186.2 2011 189.02 2012 230.45 2013 237.37 2014 290.89 2015 257.03000000000003 2016 257.33 2017 261.475 2018 272.46500000000003 2019 340.9 2020 336.44500000000005 2021 335.375