Year	per 1,000 people
1960	13.7
1961	13.9
1962	14.2
1963	14.8
1964	16
1965	15.9
1966	15.8
1967	15.4
1968	14.3
1969	13.5
1970	13.7
1971	14.1
1972	13.8
1973	13.5
1974	13.5
1975	12.6
1976	12
1977	11.6
1978	11.3
1979	11.6
1980	11.7
1981	11.3
1982	11.1
1983	11
1984	11.3
1985	11.8
1986	12.2
1987	12.5
1988	13.3
1989	13.7
1990	14.5
1991	14.4
1992	14.2
1993	13.5
1994	12.8
1995	11.7
1996	10.8
1997	10.2
1998	10.1
1999	10
2000	10.2
2001	10.3
2002	10.7
2003	11.1
2004	11.2
2005	11.2
2006	11.7
2007	11.7
2008	11.9
2009	12
2010	12.3
2011	11.8
2012	11.9
2013	11.8
2014	11.9
2015	11.7
2016	11.8
2017	11.5
2018	11.4
2019	11.1
2020	10.9
2021	11
2022	10