Year per 1,000 adults 2004 24.36 2005 38.15 2006 70.65 2007 122.8 2008 160.73 2009 185.56 2010 224.98 2011 304.98 2012 320.47 2013 410.38 2014 462.67 2015 440.14 2016 466.62 2017 566.37 2018 647.06 2019 534.61 2020 556.24 2021 535.04