Year	per 1,000 population at risk
2000	9.00495061657992
2001	9.90228903313973
2002	12.0120355081582
2003	10.306246193894
2004	10.5322276838574
2005	9.78135017982618
2006	7.18169415280518
2007	5.57575975546528
2008	4.82662236488233
2009	4.56699674960781
2010	3.29671784635223
2011	2.67100398188962
2012	3.46075398683789
2013	5.31181360432519
2014	7.04053693824214
2015	7.20387856769027
2016	5.95663456199076
2017	5.86077753261201
2018	4.62152548527599
2019	3.54700312403722
2020	2.27394783565958
2021	1.75576540497239
2022	2.67248601618327