Year	per 100,000 people
2000	14
2001	15
2002	13
2003	12
2004	12
2005	12
2006	11
2007	10
2008	10
2009	9.8
2010	11
2011	10
2012	9.5
2013	9.4
2014	9.1
2015	9.5
2016	10
2017	9.3
2018	9.2
2019	8.9
2020	7.7
2021	8.1
2022	7.8