Year	per 100,000 population
2000	2.6
2001	2.3
2002	2.2
2003	2
2004	1.7
2005	2.1
2006	2.1
2007	2.2
2008	2.2
2009	2.2
2010	2.1
2011	2.1
2012	2
2013	2
2014	1.9
2015	1.6
2016	1.7
2017	1.7
2018	1.7
2019	1.7