Year per 1,000 people 1960 18.4 1961 17.8 1962 17.2 1963 16.5 1964 16.2 1965 16.6 1966 16.5 1967 15.5 1968 15 1969 14.5 1970 13.8 1971 14.6 1972 14.8 1973 15.1 1974 15 1975 14.9 1976 14.8 1977 14.9 1978 15 1979 15.1 1980 14.8 1981 14.6 1982 14.4 1983 14.1 1984 13.9 1985 13.3 1986 12.8 1987 12.5 1988 12.3 1989 11.7 1990 11.6 1991 11.1 1992 10.3 1993 10.6 1994 10.4 1995 10.9 1996 11.8 1997 12.2 1998 10.4 1999 10 2000 9.8 2001 9.2 2002 9 2003 8.9 2004 9.1 2005 9.563 2006 9.33 2007 9.4 2008 9.9 2009 10.1 2010 9.8 2011 9.6 2012 9.8 2013 9.4 2014 9.3 2015 8.9 2016 9 2017 8.9 2018 9 2019 8.9 2020 8.9 2021 9.4 2022 8.8