Year	per 1,000 people
2004	3.682
2007	2.597
2008	2.665
2009	2.735
2010	2.805
2011	2.853
2012	2.9
2013	3.07
2014	3.193
2015	3.295
2016	3.195
2017	3.433
2018	3.849