Year	per 100,000 people
2000	12
2001	12
2002	11
2003	12
2004	12
2005	12
2006	12
2007	11
2008	11
2009	11
2010	9.8
2011	9.8
2012	8.6
2013	8.9
2014	7.4
2015	7.3
2016	7.1
2017	7.3
2018	7
2019	5.8
2020	5.3
2021	4.8
2022	4.5