Year per 1,000 adults 2008 475.61 2009 543.73 2010 545.6 2011 516.42 2012 535.14 2013 519.78 2014 513.06 2015 525.11 2016 531.23 2017 526.02 2018 522.75 2019 557.74 2020 536.05 2021 449.11