Year per 1,000 adults 2004 54.41 2005 57.730000000000004 2006 58.86 2007 66.375 2008 81.195 2009 93.13499999999999 2010 106.32 2011 124.02 2012 135.79500000000002 2013 146.36 2014 146.01 2015 139.51 2016 171.7 2017 170.165 2018 201.34 2019 226.46 2020 209.715 2021 222.235