Year	per 1,000 people
1980	9.519846724285225
1985	8.877785020684088
1990	8.196290855353809
1991	8.007969742095748
1992	7.74709555820454
1993	7.609358608194674
1994	7.5428237789877395
1995	7.309878485733477
1996	7.290307406791546
1997	7.062117303140922
1998	6.860303996708822
1999	6.6692990226787305
2000	6.532297283264639
2001	6.57624085200623
2002	6.372444590803707
2003	6.300479235240105
2004	6.193783781392782
2005	6.115586392365812
2006	6.026994220699955
2007	5.946030174500842
2008	5.889601901955015
2009	5.80166800608698
2010	5.707752350539003
2011	5.661131404700381
2012	5.661108643125955
2013	5.564824915673
2014	5.597029991057828
2015	5.488165281775817
2016	5.449439147047078
2017	5.409753530752794
2018	4.594189750909937