Year	per 1,000 people
1999	10.25
2000	10.41
2001	10.75
2002	18.93
2003	19.36
2004	19.59
2005	19.77
2006	19.78
2007	19.83
2008	20.2
2009	11.82
2010	11.92
2011	12.07
2012	12.28
2013	12.39
2014	10.49
2015	10.68
2016	10.84
2017	11.13
2018	11.37
2019	11
2020	11.33