Year	per 1,000 people
1974	10.5
1975	10.6000003814697
1976	10.6000003814697
1977	10.8000001907349
1978	10.8999996185303
1979	11.1000003814697
1980	11.1000003814697
1981	11.1000003814697
1982	11
1983	10.8000001907349
1984	10.6999998092651
1985	10.5
1986	10.3000001907349
1987	10.1999998092651
1988	10.1000003814697
1989	9.89999961853027
1990	9.6999998093
1991	9.6000003815
1992	9.3999996185
1993	9.3000001907
1994	9.1000003815
1995	8.8999996185
1996	8.8000001907
1997	8.6000003815
1998	8.3999996185
1999	8.3000001907
2000	7.97
2001	7.83
2002	7.71
2003	7.55
2004	7.39
2005	7.22
2006	7.11
2007	7.06
2008	6.9
2009	6.66
2010	6.43
2011	6.36
2012	6.34
2013	6.28
2014	6.2
2015	6.13
2016	6.06
2017	5.98
2018	5.91