Year	per 100,000 population
2000	1.3
2001	1.1
2002	1.1
2003	1
2004	1
2005	1
2006	1
2007	1
2008	1
2009	1
2010	1
2011	1
2012	1
2013	0.9
2014	0.9
2015	0.9
2016	0.9
2017	0.9
2018	0.9
2019	0.9