Year	per 1,000 people
2004	6.3
2005	7.3
2006	7.5
2007	7.2
2008	6
2009	6.3
2010	6.5
2011	6.8
2012	7.1
2013	7.5
2014	7.7
2015	7.1
2016	7.6
2017	8.2
2018	7.1
2019	7.2
2020	9.9
2021	9.1
2022	7.8