Year	per 100,000 people
2000	6.6
2001	6.4
2002	6
2003	5.9
2004	5.7
2005	5.5
2006	5.3
2007	5.1
2008	4.9
2009	4.3
2010	4.1
2011	3.9
2012	3.6
2013	3.3
2014	3.2
2015	3.2
2016	3.1
2017	3
2018	3
2019	2.9
2020	2.3
2021	2.6
2022	2.6