Year	per 1,000 people
1960	6.21367740631104
1980	8.85060024261475
1981	8.85900020599365
1982	8.88669967651367
1983	8.87679958343506
1984	8.96300029754639
1985	9.11400032043457
1986	9.45209980010986
1987	9.56420040130615
1988	9.56019973754883
1989	9.70209980010986
1990	9.7908000946
1991	9.7681999207
1992	10.2063999176
1993	10.4941997528
1994	10.196100235
1995	10.3699998856
1996	10.470000267
1997	10.279999733
1998	8.4099998474
1999	7.4899997711
2000	7.41
2001	7.2
2002	6.49
2003	6.29
2004	6.13
2005	6.41
2006	6.28
2007	6.46
2008	6.61
2009	6.72
2010	6.62
2011	6.45
2012	6.61
2013	6.82
2014	7.13
2015	7.24
2016	7.27
2017	7.45