Year	per 1,000 people
1960	10.5
1961	10.6
1962	10.9
1963	10.5
1964	10
1965	10.4
1966	10.5
1967	10.4
1968	10.7
1969	11.3
1970	11.2
1971	10.9
1972	11.1
1973	11.1
1974	10.9
1975	11.6
1976	12.1
1977	11.8
1978	12.2
1979	12.3
1980	12.3
1981	12.3
1982	11.9
1983	12.1
1984	12.6
1985	12.7
1986	11.7
1987	11.8
1988	11.9
1989	11.8
1990	12.4
1991	12.6
1992	13.1
1993	14.2
1994	15.2
1995	14.5
1996	13.4
1997	13.3
1998	14
1999	13.4
2000	13.2
2001	13.3
2002	13.3
2003	13.2
2004	13
2005	12.8
2006	12.9
2007	13
2008	12.5
2009	12.1
2010	11.9
2011	11.5
2012	11.7
2013	11.6
2014	11.8
2015	11.6
2016	11.7
2017	11.8
2018	11.9
2019	11.6
2020	11.9
2021	14
2022	12.8