Year per 1,000 population at risk 2000 28.318677357514044 2001 28.483895847453983 2002 25.80224277063502 2003 24.23202734450275 2004 21.297758420337882 2005 21.971773749730808 2006 21.80785698078233 2007 17.946541266134528 2008 12.906675157694485 2009 11.320034576236175 2010 13.098350146912422 2011 11.147444602853168 2012 10.845284938202031 2013 10.884633685089046 2014 11.766976074623736 2015 12.852518747084703 2016 15.565843941972714 2017 15.567711776559571 2018 17.061006179700993 2019 17.879921646288324 2020 18.91677355172953 2021 20.063285702930305 2022 19.212658237183533