Year	per 1,000 people
1960	8.721
1961	8.613
1962	8.177
1963	7.788
1964	7.424
1965	7.081
1966	6.737
1967	6.449
1968	6.166
1969	5.922
1970	5.732
1971	5.567
1972	5.596
1973	5.613
1974	5.682
1975	5.759
1976	5.834
1977	5.924
1978	6.02
1979	6.152
1980	6.272
1981	6.397
1982	6.238
1983	6.024
1984	5.799
1985	5.562
1986	5.327
1987	5.079
1988	4.879
1989	4.639
1990	4.425
1991	4.179
1992	4.018
1993	3.936
1994	3.859
1995	3.796
1996	3.639
1997	3.653
1998	3.672
1999	3.654
2000	3.64
2001	3.654
2002	3.701
2003	3.692
2004	3.694
2005	3.644
2006	3.64
2007	3.62
2008	3.577
2009	3.526
2010	3.678
2011	3.719
2012	3.771
2013	3.715
2014	3.768
2015	3.851
2016	3.877
2017	3.864
2018	3.86
2019	3.983
2020	4.047
2021	4.111
2022	4.256