Year	per 1,000 people
1960	10.8000001907349
1970	10.8000001907349
1980	11.1999998092651
1985	10.8999996185303
1986	10.8000001907349
1987	10.6999998092651
1988	10.6000003814697
1989	10.3999996185303
1990	10.1999998093
1991	9.8999996185
1992	9.6999998093
1993	9.3999996185
1994	9.5
1995	9.3999996185
1996	9.3000001907
1997	9.1999998093
1998	9
1999	8.8999996185
2000	7.95
2001	7.85
2002	7.81
2003	7.73
2004	7.73
2005	7.69
2006	7.66
2007	7.75
2008	7.69
2009	7.68
2010	7.65
2011	7.68
2012	7.67
2013	7.64
2014	7.58
2015	7.54
2016	7.42
2017	7.37
2018	7.27