Year	per 1,000 people
1960	11.5
1961	12
1962	11.9
1963	12.2
1964	11.3
1965	11.6
1966	11.8
1967	11.2
1968	11.9
1969	11.9
1970	11.8
1971	11.5
1972	12
1973	11.9
1974	11.9
1975	11.8
1976	12.1
1977	11.7
1978	11.9
1979	12
1980	11.7
1981	11.7
1982	11.8
1983	11.7
1984	11.4
1985	11.9
1986	11.7
1987	11.3
1988	11.4
1989	11.5
1990	11.2
1991	11.3
1992	11
1993	11.4
1994	10.8
1995	11.1
1996	10.9
1997	10.8
1998	10.8
1999	10.8
2000	10.3
2001	10.2
2002	10.2
2003	10.2
2004	9.7
2005	9.6
2006	9.4
2007	9.4
2008	9.4
2009	9
2010	8.9
2011	8.7
2012	8.9
2013	9
2014	8.8
2015	9.2
2016	9.1
2017	9.2
2018	9.2
2019	9
2020	10.1
2021	9.7
2022	9.1