Year	per 1,000 population at risk
2000	48.6362946951128
2001	15.2865697550569
2002	9.42130770326305
2003	2.36726053898311
2004	0.829838678914669
2005	0.362431820276248
2006	0.129314249380014
2007	0.0428748681814343
2008	0.139100301819792
2009	0.112715664229588
2010	0.143885890915562
2011	0.0258454968702979
2012	0.00475801953849693
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0