Year	per 100,000 population
2000	0.6
2001	1
2002	0.7
2003	1.2
2004	1.1
2005	1
2006	1.1
2007	0.9
2008	0.7
2009	0.7
2010	0.9
2011	0.6
2012	0.8
2013	0.5
2014	0.5
2015	0.4
2016	0.6
2017	0.6
2018	0.4
2019	0.5