Year	per 1,000 people
1960	24.389
1961	23.834
1962	22.771
1963	21.15
1964	19.162
1965	17.88
1966	17.06
1967	16.631
1968	16.278
1969	15.948
1970	16.281
1971	16.412
1972	16.185
1973	15.816
1974	15.998
1975	15.738
1976	15.885
1977	16.026
1978	16.17
1979	16.228
1980	16.34
1981	16.3
1982	16.3
1983	17.6
1984	17
1985	16.5
1986	17.1
1987	16.1
1988	16.1
1989	15.1
1990	14
1991	13
1992	12.5
1993	11.5
1994	10.8
1995	9.9
1996	9.4
1997	8.9
1998	9.2
1999	9.3
2000	9.4
2001	9.2
2002	8.9
2003	9
2004	9.1
2005	9.3
2006	9.9
2007	10.7
2008	11.1
2009	11.4
2010	11.4
2011	11.5
2012	12.2
2013	12.5
2014	12.5
2015	12.5
2016	12.4
2017	10.8
2018	9.9
2019	9.3
2020	9.47
2021	9.283
2022	9.165