Year	per 1,000 people
1960	13.4
1961	13.7
1962	13.9
1963	15.4
1964	15.9
1965	15.1
1966	14.4
1967	14.1
1968	13.9
1969	14.5
1970	15
1971	15.7
1972	16.6
1973	18.3
1974	19.4
1975	19.1
1976	18.5
1977	17.8
1978	17.5
1979	16.7
1980	14.9
1981	14
1982	13.7
1983	13.3
1984	13.3
1985	13.1
1986	12.9
1987	12.7
1988	12.8
1989	12.4
1990	12.6
1991	12.5
1992	11.8
1993	11.7
1994	10.3
1995	9.3
1996	8.8
1997	8.8
1998	8.8
1999	8.7
2000	8.9
2001	8.9
2002	9.1
2003	9.2
2004	9.6
2005	10
2006	10.3
2007	11.1
2008	11.5
2009	11.3
2010	11.2
2011	10.4
2012	10.3
2013	10.2
2014	10.4
2015	10.5
2016	10.7
2017	10.8
2018	10.7
2019	10.5
2020	10.3
2021	10.6
2022	9.5