Year	per 100,000 people
2000	13
2001	11
2002	8.6
2003	8.3
2004	7.6
2005	8.4
2006	7.2
2007	7.5
2008	6.9
2009	6.1
2010	6.9
2011	7.4
2012	7
2013	6.7
2014	6
2015	6.5
2016	5.9
2017	5.1
2018	5.4
2019	5.2
2020	4.1
2021	3.8
2022	4