Year	per 1,000 people
1960	35.725
1961	35
1962	34
1963	33.5
1964	30.7
1965	28.1
1966	25.3
1967	23.7
1968	21.7
1969	21.3
1970	20
1971	19.7
1972	19.5
1973	19.4
1974	19.1
1975	17.9
1976	17.4
1977	17.5
1978	17.3
1979	16.8
1980	17
1981	16.8
1982	16.4
1983	15.6
1984	14.4
1985	14
1986	13
1987	12.6
1988	13.4
1989	12.3
1990	12
1991	12
1992	12.3
1993	12
1994	11.9
1995	11.2
1996	9.9
1997	9.1
1998	8.1
1999	7.8
2000	8.1
2001	7.2
2002	7.1
2003	6.9
2004	7.2
2005	8.4
2006	9.6
2007	10.2
2008	11.3
2009	11.8
2010	12.6
2011	13.5
2012	12.8
2013	8
2014	8.6
2015	8.2
2016	8.3
2017	7.6
2018	7.2
2019	7
2020	5.8
2021	5
2022	4.4