Year	per 1,000 population at risk
2000	3.56158996315995
2001	2.37096601204086
2002	2.16131122040233
2003	1.75869052849134
2004	1.54561679685213
2005	1.32729229687328
2006	1.10944444370893
2007	1.02829980361695
2008	1.01362785451064
2009	1.14813781221766
2010	0.513898308494915
2011	0.464464729193096
2012	0.33944234471939
2013	0.19907004128592
2014	0.26056313412964
2015	0.202969797544497
2016	0.213880328715821
2017	0.282621250660474
2018	0.305428526111476
2019	0.233048546501104
2020	0.133275231322375
2021	0.0900918341059391
2022	0.060301425740274