Year	per 1,000 people
1960	7.8
1961	7.7
1962	7.7
1963	7.8
1964	7.5
1965	7.6
1966	7.5
1967	7.4
1968	7.4
1969	7.3
1970	7.3
1971	7.3
1972	7.4
1973	7.4
1974	7.4
1975	7.3
1976	7.2
1977	7.1
1978	7.1
1979	7
1980	7.1
1981	7
1982	7.1
1983	7
1984	7
1985	7
1986	7.2
1987	7.2
1988	7.3
1989	7.3
1990	7.3
1991	7
1992	6.9
1993	7.1
1994	7.1
1995	7.2
1996	7.2
1997	7.2
1998	7.2
1999	7.2
2000	7.1
2001	7.1
2002	7.1
2003	7.1
2004	7.1
2005	7.1
2006	7
2007	7.2
2008	7.2
2009	7.1
2010	7.1
2011	7.1
2012	7.1
2013	7.2
2014	7.3
2015	7.4
2016	7.4
2017	7.6
2018	7.7
2019	7.6
2020	8.1
2021	8.2
2022	8.6