Year	per 1,000 population at risk
2000	0.542473270387871
2001	0.476379476967515
2002	1.13004725347825
2003	2.22313230381526
2004	2.46891650230233
2005	1.74316942604533
2006	0.775828188837733
2007	0.586730666267684
2008	0.334353331619577
2009	0.343430929498536
2010	0.181232322125624
2011	0.150521301394224
2012	0.352975267484101
2013	0.289012600168252
2014	0.385723842454263
2015	0.216878339926435
2016	0.299891201399739
2017	0.291871116128266
2018	0.282722738218094
2019	0.652021513536235
2020	0.7128346734463
2021	1.42555880121344
2022	2.25983995254844