Year	per 1,000 population at risk
2000	6.64376884661751
2001	2.905047933838
2002	2.10569531701573
2003	1.81606876084208
2004	1.84287521445709
2005	1.75245764894015
2006	0.810277682963393
2007	0.34795416327055
2008	0.192798949255716
2009	0.15202350771795
2010	0.169996574840701
2011	0.223924293319025
2012	0.294708771580728
2013	0.273163513896706
2014	0.264659016325032
2015	0.520678664767735
2016	1.41271023024171
2017	2.43140819671786
2018	3.48539352458216
2019	2.85066145679595
2020	5.46139255165565
2021	4.88631038529645
2022	3.33628583727037