Year	per 100,000 people
2000	10
2001	11
2002	9.6
2003	12
2004	10
2005	9.2
2006	9.5
2007	7.5
2008	7.9
2009	8
2010	8
2011	8
2012	7.6
2013	7
2014	7.6
2015	7.3
2016	7.3
2017	7.3
2018	7.2
2019	7.2
2020	7.2
2021	6.8
2022	5.9