Year	per 100,000 people
2000	10
2001	9.4
2002	8.4
2003	8.4
2004	8
2005	6.4
2006	5.7
2007	6.6
2008	5.2
2009	5.5
2010	5.3
2011	6.4
2012	7.7
2013	4.6
2014	5.3
2015	4
2016	3.5
2017	3.2
2018	4
2019	2.9
2020	2.1
2021	2.8
2022	2.6