Year	per 1,000 people
1960	31.387
1961	28.893
1962	26.802
1963	25.247
1964	23.189
1965	20.799
1966	18.42
1967	16.086
1968	13.74
1969	11.909
1970	10.658
1971	10.069
1972	10.039
1973	10.214
1974	10.429
1975	10.72
1976	11.025
1977	11.739
1978	12.571
1979	14.082
1980	15.955
1981	17.763
1982	19.794
1983	21.586
1984	22.672
1985	23.436
1986	23.042
1987	22.171
1988	21.167
1989	20.938
1990	20.078
1991	18.81
1992	17.765
1993	16.409
1994	15.299
1995	14.018
1996	12.719
1997	11.466
1998	10.299
1999	9.278
2000	8.364
2001	7.575
2002	7.119
2003	6.96
2004	6.957
2005	7.223
2006	7.581
2007	8.027
2008	8.383
2009	8.876
2010	9.561
2011	10.475
2012	11.319
2013	11.553
2014	11.883
2015	11.634
2016	11.423
2017	10.877
2018	10.621
2019	10.295
2020	10.128
2021	10.114
2022	10.044