Year	per 1,000 people
1960	16.7
1961	16.7
1962	16.1
1963	15.3
1964	14.8
1965	13.8
1966	14
1967	14
1968	14.1
1969	14
1970	14.6
1971	14.8
1972	14.6
1973	14.1
1974	14.3
1975	14.2
1976	14
1977	13.8
1978	13.7
1979	13.8
1980	14.1
1981	14.2
1982	14.8
1983	15.9
1984	15.9
1985	15.4
1986	16.1
1987	16
1988	15.6
1989	14.6
1990	14.2
1991	13.1
1992	12.1
1993	10.4
1994	9.6
1995	8.7
1996	8.1
1997	7.7
1998	7.6
1999	8.1
2000	8.6
2001	8.4
2002	8.7
2003	9.2
2004	9.1
2005	9.8
2006	10.3
2007	10.9
2008	11.2
2009	10.3
2010	9.4
2011	9.1
2012	9.8
2013	10.2
2014	10.9
2015	11.1
2016	11.2
2017	10.7
2018	10
2019	9.8
2020	9.2
2021	9.2
2022	8.5