Year	per 1,000 population at risk
2000	2.85990655965099
2001	1.29797032740183
2002	1.07669204917333
2003	0.694459550148116
2004	0.48555608586618
2005	0.404785257407494
2006	0.469533589286698
2007	0.164963690326063
2008	0.0207330950500245
2009	0.0189891984200987
2010	0.00919498537204655
2011	0.021341488875053
2012	0.024810524745624
2013	0.0100713167713491
2014	0.0087085736778716
2015	0.0236344418171298
2016	0.0759079794356353
2017	0.0482737497985185
2018	0.0162447643923286
2019	0.00989111702206578
2020	0.0215024012741857
2021	0
2022	0