Year	per 100,000 people
2000	12
2001	10
2002	9.9
2003	8.7
2004	7
2005	7.4
2006	6.1
2007	6.5
2008	7.2
2009	8.7
2010	6.6
2011	6.7
2012	5.5
2013	5.6
2014	5.3
2015	5.6
2016	4.7
2017	4.9
2018	4.8
2019	4.7
2020	3.6
2021	3.5
2022	3.9