Year per 1,000 people 1960 7.751 1961 7.574 1962 7.811 1963 7.738 1964 7.241 1965 7.356 1966 7.379 1967 7.396 1968 7.626 1969 7.626 1970 7.927 1971 7.914 1972 8.128 1973 8.156 1974 8.361 1975 8.746 1976 8.8 1977 8.9 1978 9.1 1979 9.5 1980 9.9 1981 9.6 1982 9.6 1983 9.9 1984 10.5 1985 10.6 1986 9.7 1987 9.9 1988 10.1 1989 10.2 1990 10.8 1991 11.2 1992 11.4 1993 12.6 1994 12.7 1995 13.1 1996 13.1 1997 13.5 1998 13.6 1999 14.2 2000 13.5 2001 14.1 2002 14.8 2003 14.5 2004 14.3 2005 14.5 2006 14.2 2007 13.7 2008 13.8 2009 14.1 2010 14.5 2011 14.3 2012 13.4 2013 13.2 2014 12.8 2015 12.6 2016 12.6 2017 12.6 2018 12.7 2019 12.8 2020 16.553 2021 16.544 2022 15.49