Year	per 1,000 population at risk
2000	9.66503471861481
2001	9.66500573078111
2002	9.66504953609261
2003	9.66501482592164
2004	9.66505057908244
2005	9.6650764370323
2006	9.80819784586614
2007	8.70787004111086
2008	10.4683766862188
2009	9.66498595624846
2010	9.66507748334769
2011	9.16220726403153
2012	7.25764214381968
2013	6.82307604875711
2014	3.5600535314067
2015	3.41019706669015
2016	3.79013047058462
2017	3.41263170345362
2018	1.62622829785632
2019	1.77545628012875
2020	4.04643881508519
2021	2.20445159206753
2022	3.37913988112577