Year	per 100,000 people
2000	21
2001	21
2002	20
2003	16
2004	14
2005	15
2006	12
2007	12
2008	12
2009	10
2010	9.4
2011	10
2012	7.4
2013	7.7
2014	7.9
2015	7.1
2016	6.5
2017	6.1
2018	5.4
2019	5.3
2020	4.1
2021	4.3
2022	3.9