Year	per 100,000 population
2000	2.1
2001	2.1
2002	2.1
2003	2.2
2004	2.1
2005	2.2
2006	2.2
2007	2.1
2008	2.1
2009	2
2010	2
2011	1.9
2012	3.3
2013	3.2
2014	3.4
2015	4
2016	2
2017	2.1
2018	2
2019	2.1