Year	per 100,000 people
2000	9.2
2001	8.7
2002	9.4
2003	9
2004	8.6
2005	8
2006	7.3
2007	6.4
2008	7
2009	7.5
2010	7.5
2011	7.6
2012	6
2013	6.6
2014	5.9
2015	7.4
2016	7.9
2017	7.2
2018	6.4
2019	5.4
2020	4.7
2021	4.7
2022	4.6