Year	per 1,000 people
1985	10.144377768614463
1986	10.650990481632334
1987	10.683360685578156
1988	10.716147920420864
1989	10.7323529452412
1990	10.255685927641185
1991	10.026136187064177
1992	9.792753388399467
1993	9.629558713892743
1994	9.354479668103204
1995	9.142772643824028
1996	8.773397277810526
1997	8.283579066170685
1998	7.981793653968076
1999	7.762690179519955
2000	7.781978397385328
2001	7.972199274860043
2002	7.695370903710755
2003	7.672485199019833
2004	7.633601765760146
2005	7.533247550897778
2006	7.470289987759265
2007	7.344699206793831
2008	7.083582148184953
2009	7.049695161650671
2010	6.8811474220623055
2011	6.782906651170064
2012	6.726357150474232
2013	6.5999216560724
2014	6.377458358803613
2015	6.375400749893157