Year	per 1,000 people
1960	10
1961	9.1
1962	10
1963	9.1
1964	10.1
1965	9.3
1966	8.8
1967	9.5
1968	10
1969	10.7
1970	10
1971	10.1
1972	10.8
1973	10.2
1974	10
1975	10.1
1976	9.9
1977	9.9
1978	10.6
1979	10.5
1980	10.9
1981	11.2
1982	11
1983	11.8
1984	11.6
1985	11.1
1986	11
1987	11.2
1988	11.1
1989	11
1990	10.9
1991	11.7
1992	11.3
1993	11.1
1994	10.6
1995	10.9
1996	11.1
1997	11.5
1998	11.5
1999	11.5
2000	11.2
2001	11.2
2002	11.4
2003	11.8
2004	11.2
2005	11.656
2006	11.341
2007	11.798
2008	11.8
2009	11.8
2010	11.8
2011	11.9
2012	12.1
2013	11.8
2014	12
2015	12.9
2016	12.3
2017	13
2018	12.9
2019	12.7
2020	14.1
2021	16.2
2022	14.8