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