Year per 1,000 adults 2004 412.56 2005 422 2006 427.4 2007 425.91 2008 429.45 2009 429.71 2010 448.43 2011 462.64 2012 453.46 2013 442.98 2014 441.43 2015 517.51 2016 529.95 2017 538.1 2018 529.37 2019 552.22 2020 552.48 2021 555.25