Year	per 1,000 people
1960	23.183
1961	22.928
1962	22.778
1963	22.701
1964	22.871
1965	22.801
1966	22.79
1967	22.73
1968	22.682
1969	22.618
1970	22.533
1971	22.478
1972	22.501
1973	22.392
1974	22.149
1975	21.796
1976	21.791
1977	21.794
1978	21.787
1979	21.897
1980	21.891
1981	23.761
1982	23.482
1983	23.276
1984	24.964
1985	24.664
1986	22.76
1987	22.614
1988	20.57
1989	20.313
1990	20.036
1991	19.812
1992	19.515
1993	19.144
1994	18.853
1995	18.429
1996	17.91
1997	17.321
1998	16.829
1999	16.217
2000	15.677
2001	15.181
2002	14.731
2003	14.434
2004	14.073
2005	13.753
2006	13.399
2007	12.93
2008	12.536
2009	12.149
2010	11.902
2011	11.473
2012	10.995
2013	10.492
2014	10.005
2015	9.506
2016	9.049
2017	8.69
2018	8.337
2019	8.04
2020	8.004
2021	8.793
2022	8.611