Year	per 100,000 people
2000	12
2001	9.4
2002	9.4
2003	9.5
2004	8.4
2005	7.7
2006	7
2007	6.3
2008	5.6
2009	5.6
2010	5.5
2011	5.5
2012	5.4
2013	5.6
2014	5.8
2015	7.6
2016	7.7
2017	7.1
2018	7
2019	6.1
2020	5.3
2021	5
2022	5.1