Year	per 100,000 population
2000	2.1
2001	2
2002	2.3
2003	2.5
2004	2.4
2005	2.3
2006	1.9
2007	1.9
2008	1.9
2009	1.8
2010	1.7
2011	1.6
2012	1.5
2013	1.5
2014	1.2
2015	1.1
2016	1
2017	1.1
2018	0.9
2019	1