Year	per 1,000 people
1960	26.5
1961	27.1
1962	26.2
1963	25.5
1964	24.2
1965	22.9
1966	22.5
1967	22.5
1968	22.7
1969	22.3
1970	22.1
1971	22.6
1972	21.8
1973	20.5
1974	19.6
1975	18.3
1976	17.7
1977	17.3
1978	16.3
1979	16.8
1980	16.2
1981	16.2
1982	15.8
1983	15.8
1984	16
1985	15.9
1986	16.3
1987	16.8
1988	17.3
1989	17.5
1990	17.5
1991	17.4
1992	17.28
1993	16.53
1994	15.95
1995	15.77
1996	15.34
1997	15.23
1998	14.51
1999	14.87
2000	14.66
2001	14.36
2002	13.67
2003	13.94
2004	14.2
2005	13.96
2006	14.14
2007	15.15
2008	15.1
2009	14.53
2010	14.68
2011	14
2012	13.87
2013	13.2
2014	12.67
2015	13.23
2016	12.6
2017	12.38
2018	11.84
2019	11.96
2020	11.32
2021	11.48
2022	11.49