Year	per 1,000 people
1960	16.8
1961	17.3
1962	16.8
1963	17.1
1964	17.2
1965	16.4
1966	15.9
1967	15.3
1968	14.8
1969	14.7
1970	14.7
1971	14.6
1972	14
1973	13.3
1974	12.7
1975	12.2
1976	12.3
1977	12.4
1978	12.5
1979	12.6
1980	12.6
1981	12.6
1982	12.2
1983	11.9
1984	11.7
1985	11.6
1986	11.9
1987	11.9
1988	12.1
1989	12.2
1990	12.4
1991	12.6
1992	12.4
1993	12
1994	11.5
1995	11.4
1996	11.5
1997	11.4
1998	11.2
1999	11.2
2000	11.4
2001	11.2
2002	10.9
2003	11
2004	11.3
2005	11.4
2006	11.6
2007	11.7
2008	11.9
2009	11.8
2010	11.9
2011	11.7
2012	11.5
2013	11.3
2014	11.2
2015	10.8
2016	10.8
2017	10.5
2018	10.4
2019	10.2
2020	9.9
2021	10.2
2022	9.8