Year	per 1,000 people
1960	8.7
1961	8.7
1962	9.2
1963	8.3
1964	8.1
1965	8.6
1966	8.2
1967	9.2
1968	9.5
1969	10.1
1970	9.5
1971	9.5
1972	9.2
1973	9.8
1974	9.1
1975	9.3
1976	9.5
1977	9.6
1978	9.7
1979	9.8
1980	10.4
1981	10
1982	10
1983	10.4
1984	10.3
1985	10.9
1986	10.6
1987	11.1
1988	11
1989	10.7
1990	10.6
1991	10.9
1992	11.6
1993	11.6
1994	11.7
1995	12
1996	12.7
1997	12.4
1998	12
1999	11.8
2000	11.4
2001	11.7
2002	12.4
2003	12.4
2004	12.1
2005	12.3
2006	12.2
2007	12.1
2008	12.3
2009	12.6
2010	12.8
2011	12.5
2012	12.7
2013	12.4
2014	12.8
2015	13.2
2016	13.1
2017	13.4
2018	13.6
2019	13.4
2020	15.5
2021	17.5
2022	14.3