Year	per 1,000 people
1960	12.7
1961	12.1
1962	12.7
1963	12.8
1964	12.3
1965	13
1966	12.5
1967	12.9
1968	12.9
1969	13.3
1970	13.2
1971	13
1972	12.6
1973	12.2
1974	12.4
1975	12.7
1976	12.6
1977	12.2
1978	12.5
1979	12.2
1980	12.2
1981	12.2
1982	12.1
1983	12.3
1984	11.7
1985	11.8
1986	11.5
1987	11.2
1988	11
1989	10.9
1990	10.8
1991	10.8
1992	10.6
1993	10.4
1994	10.2
1995	10.2
1996	10.2
1997	10
1998	9.8
1999	9.8
2000	9.6
2001	9.3
2002	9.4
2003	9.5
2004	9.1
2005	9.1
2006	9
2007	9
2008	9
2009	9.3
2010	9.2
2011	9.1
2012	9.4
2013	9.4
2014	9.2
2015	9.6
2016	9.2
2017	9.5
2018	9.5
2019	9.4
2020	10.3
2021	10.3
2022	10.3