Year	per 1,000 population at risk
2000	18.790091208644245
2001	18.739546542208224
2002	17.403020149588023
2003	17.97293948588361
2004	18.801906694760785
2005	19.877461704860092
2006	16.066823450620205
2007	15.423904825262456
2008	15.738805207523539
2009	15.958512351654779
2010	15.681155289920023
2011	13.806270427767195
2012	11.069720171728463
2013	8.636522195390171
2014	8.458515388204924
2015	8.900051541155216
2016	9.325067274641668
2017	7.163553703885964
2018	5.208439909016453
2019	4.21248829204191
2020	3.5848684516521865
2021	3.4195258614496633
2022	3.9331126564533143