Year	per 1,000 people
1960	21.607
1961	22.172
1962	23.667
1963	26.024
1964	24.623
1965	25.687
1966	22.644
1967	20.311
1968	20.264
1969	20.565
1970	20.933
1971	20.864
1972	19.94
1973	19.343
1974	19.004
1975	18.866
1976	18.937
1977	19.287
1978	19.767
1979	20.526
1980	21.344
1981	21.052
1982	20.538
1983	19.576
1984	18.809
1985	18.191
1986	17.734
1987	17.396
1988	17.16
1989	17.147
1990	17.226
1991	17.363
1992	17.497
1993	17.533
1994	17.59
1995	17.64
1996	17.465
1997	16.119
1998	14.961
1999	13.929
2000	13.015
2001	12.128
2002	11.188
2003	11.117
2004	11.193
2005	11.266
2006	11.328
2007	11.441
2008	11.572
2009	11.757
2010	11.959
2011	12.096
2012	12.14
2013	11.731
2014	12.706
2015	13.604
2016	11.916
2017	11.482
2018	11.242
2019	11.015
2020	10.844
2021	10.714
2022	10.564