Year	per 1,000 population at risk
2000	6.79556521425609
2001	6.79562361585442
2002	6.79559192359474
2003	6.79560206199653
2004	6.79563065919523
2005	6.79558382861898
2006	4.45893884554867
2007	8.17178694372001
2008	7.72347431344839
2009	5.09802549942504
2010	4.33381350638823
2011	3.91839058370565
2012	2.15821645358334
2013	1.9032681464696
2014	3.94300591224804
2015	2.67370121662283
2016	1.83629233987756
2017	1.91155626981395
2018	0.702767339850168
2019	1.18860442188651
2020	0.418167756821788
2021	0.491683783004288
2022	1.21693558480419