Year	per 1,000 population at risk
2000	5.902993400172114
2001	5.552236126305029
2002	5.200006790371232
2003	5.251811913056664
2004	5.656112025525384
2005	5.228798292520063
2006	5.148620365309228
2007	4.573809569750908
2008	4.695602750347875
2009	5.100911373917451
2010	5.221859595296301
2011	4.509490835487278
2012	5.135075881065743
2013	3.7782345897654688
2014	3.420399809045697
2015	2.4241705414359034
2016	2.550225942579339
2017	2.265967524979881
2018	2.2676135306411265
2019	2.0885493779003244
2020	2.2714304487703254
2022	3.2377490059147003