Year	per 1,000 people
1960	9.677
1961	9.397
1962	9.11
1963	8.61
1964	8.42
1965	8.024
1966	7.626
1967	7.655
1968	7.539
1969	7.74
1970	7.787
1971	7.637
1972	7.323
1973	7.313
1974	7.096
1975	7.24
1976	7.162
1977	7.382
1978	7.617
1979	8.008
1980	7.568
1981	7.865
1982	8.024
1983	8.143
1984	7.264
1985	6.867
1986	6.727
1987	6.491
1988	6.094
1989	6.617
1990	6.772
1991	6.948
1992	7.728
1993	7.702
1994	8.723
1995	8
1996	8.2
1997	8.5
1998	8.7
1999	8.9
2000	9
2001	8.9
2002	9
2003	9.3
2004	9.3
2005	9.5
2006	9.7
2007	9.7
2008	9.3
2009	9.5
2010	9.1
2011	9.4
2012	9.5
2013	9.5
2014	9.7
2015	10.2
2016	10.4
2017	10.5
2018	10.5
2019	10.6
2020	11.7
2021	14.8
2022	11.5