Year per 1,000 population at risk 2000 0.323949428178244 2001 0.275388056325758 2002 0.347815891656485 2003 0.403603982063131 2004 0.611507216728718 2005 0.98055975897643 2006 0.886797857996971 2007 0.671568200569887 2008 0.450868660910545 2009 0.397979506031224 2010 0.594649896623403 2011 0.382755753434903 2012 0.22297795015936 2013 0.10956786647949 2014 0.0999365420614543 2015 0.135735396232209 2016 0.146754298469617 2017 0.071614745407875 2018 0.0900525795763785 2019 0.265600793332219 2020 0.168184175371037 2021 0.0463753272808088 2022 0.051737582454751