Year	per 1,000 people
1960	41.93
1961	40.983
1962	39.657
1963	38.083
1964	36.448
1965	34.947
1966	33.429
1967	32.015
1968	30.454
1969	30.361
1970	31.2
1971	31.2
1972	28.4
1973	28.3
1974	26.6
1975	24.8
1976	22.2
1977	22.7
1978	20.3
1979	23
1980	22.6
1981	22.4
1982	21.6
1983	19.3
1984	16.7
1985	16.1
1986	15.4
1987	15
1988	15.1
1989	15.1
1990	15.2
1991	16.4
1992	16.7
1993	16
1994	16
1995	15.7
1996	15
1997	14.5
1998	13.7
1999	13.2
2000	13.5
2001	11.7
2002	10.3
2003	10.2
2004	9.8
2005	9
2006	9.2
2007	10.1
2008	9.4
2009	9
2010	9.4
2011	9.4
2012	9.6
2013	8.6
2014	8.6
2015	8.6
2016	7.9
2017	7
2018	6.4
2019	5.9
2020	5.3
2021	5.1
2022	4.9