Year per 1,000 people 1960 12.684 1961 12.506 1962 12.09 1963 11.745 1964 11.62 1965 11.134 1966 10.931 1967 10.923 1968 10.691 1969 10.515 1970 10.521 1971 10.333 1972 10.247 1973 10.128 1974 10.13 1975 10.049 1976 10.127 1977 9.959 1978 9.988 1979 9.874 1980 10.044 1981 9.817 1982 9.783 1983 9.903 1984 10.067 1985 9.918 1986 9.998 1987 10.267 1988 10.157 1989 10.369 1990 10.499 1991 10.634 1992 10.975 1993 11.012 1994 10.73 1995 10.569 1996 10.652 1997 10.814 1998 11.062 1999 11.125 2000 11.188 2001 11.482 2002 11.409 2003 11.463 2004 11.633 2005 11.445 2006 11.587 2007 11.876 2008 12.318 2009 12.194 2010 12.347 2011 12.418 2012 12.691 2013 12.783 2014 12.576 2015 12.531 2016 12.411 2017 12.603 2018 12.963 2019 12.88 2020 13.976 2021 15.166 2022 15.197