Year	per 1,000 people
1960	17.3
1961	17.9
1962	17.8
1963	18.1
1964	18
1965	17.4
1966	17.2
1967	16.5
1968	15.7
1969	14.7
1970	13.4
1971	12.9
1972	11.5
1973	10.3
1974	10.2
1975	9.9
1976	10.2
1977	10.3
1978	10.4
1979	10.5
1980	11.1
1981	11
1982	11
1983	10.6
1984	10.4
1985	10.5
1986	10.9
1987	11.2
1988	11.4
1989	11.2
1990	11.4
1991	10.4
1992	10
1993	9.8
1994	9.5
1995	9.4
1996	9.7
1997	9.9
1998	9.6
1999	9.4
2000	9.3
2001	8.9
2002	8.7
2003	8.6
2004	8.6
2005	8.3
2006	8.2
2007	8.3
2008	8.3
2009	8.1
2010	8.3
2011	8.3
2012	8.4
2013	8.5
2014	8.8
2015	9
2016	9.6
2017	9.5
2018	9.5
2019	9.4
2020	9.3
2021	9.6
2022	8.8