Year per 1,000 people 1960 28.05 1961 27.892 1962 27.532 1963 26.826 1964 25.753 1965 24.779 1966 23.718 1967 22.49 1968 21.718 1969 21.288 1970 20.773 1971 20.879 1972 20.835 1973 20.385 1974 19.866 1975 19.43 1976 19.041 1977 18.65 1978 18.215 1979 18.009 1980 18.081 1981 18.059 1982 18.044 1983 17.941 1984 17.523 1985 16.899 1986 16.886 1987 16.748 1988 16.185 1989 15.645 1990 15.402 1991 15.611 1992 15.506 1993 15.166 1994 15.001 1995 15.4 1996 15 1997 14.4 1998 15.1 1999 14.6 2000 15.2 2001 14.6 2002 13.9 2003 13.6 2004 12.8 2005 12 2006 12.3 2007 12.7 2008 13.4 2009 14 2010 12 2011 11.6 2012 12 2013 12 2014 12.1 2015 11.9 2016 12.2 2017 11.9 2018 11.7 2019 11.6 2020 11.4 2021 11.4 2022 11.4