Year	per 1,000 people
1960	9.6
1961	8.8
1962	9.9
1963	9.3
1964	10.2
1965	9.7
1966	9.1
1967	9.7
1968	10.2
1969	10.8
1970	10.1
1971	10
1972	10.4
1973	10
1974	9.7
1975	10.1
1976	10
1977	9.6
1978	9.9
1979	9.6
1980	9.9
1981	9.8
1982	10.3
1983	10.8
1984	10.5
1985	10.2
1986	9.9
1987	10
1988	9.6
1989	9.4
1990	9.3
1991	9.7
1992	9.7
1993	10
1994	9.7
1995	9.5
1996	9.4
1997	9.5
1998	9.6
1999	9.5
2000	9.3
2001	9.3
2002	9.4
2003	9.7
2004	9.3
2005	9.4
2006	9.1
2007	9.2
2008	9.1
2009	9.2
2010	9.1
2011	9.1
2012	9.4
2013	9.4
2014	9.2
2015	9.6
2016	9.5
2017	9.9
2018	9.9
2019	9.9
2020	11.4
2021	11
2022	10.6