Year per 1,000 population at risk 2000 1.34916138741754 2001 0.960788142337626 2002 0.707593917325863 2003 0.489763733336607 2004 0.865984091153391 2005 2.34416375383964 2006 1.89446344201102 2007 0.786998248398011 2008 0.613071756050752 2009 0.164047952092989 2010 0.0679940758616086 2011 0.00610510301140311 2012 0.00422244567672835 2013 0 2014 0 2015 0 2016 0.00231104198527751 2017 0.00686560127791725 2018 0.0396767816008561 2019 0.0533832026100453 2020 0.0501927961068237 2021 0.104773921161228 2022 0.223902409432578