Year	per 100,000 population
2000	0.4
2001	0.4
2002	0.7
2003	0.7
2004	0.5
2005	0.4
2006	3
2007	0.8
2008	0.5
2009	0.5
2010	0.5
2011	0.3
2012	0.5
2013	0.3
2014	0.1
2015	0.1
2016	0.1
2017	0.1
2018	0.1
2019	0.1