Year	per 100,000 people
2000	9
2001	10
2002	9.7
2003	9.3
2004	9.3
2005	8
2006	7.1
2007	6.5
2008	6.7
2009	7.8
2010	7.1
2011	6.7
2012	6.3
2013	5.7
2014	5.5
2015	5.7
2016	5.9
2017	5.2
2018	5.3
2019	4.9
2020	4.1
2021	4.4
2022	4.1