Year	per 1,000 people
1994	9.3000001907
1995	8.8000001907
1996	8.8000001907
1997	8
1998	8.1000003815
1999	8.1000003815
2000	8.16
2001	7.92
2002	7.91
2003	7.9
2004	7.89
2005	7.91
2006	7.98
2007	7.19
2008	7.11
2009	7.14
2010	7.18
2011	7.19
2012	7
2013	7.04
2014	6.98
2015	6.99
2016	7
2017	7.02
2018	7.01