Year per 1,000 people 1960 46.49 1961 46.051 1962 45.513 1963 44.929 1964 44.313 1965 43.68 1966 42.913 1967 42.121 1968 41.396 1969 40.884 1970 40.485 1971 40.016 1972 39.319 1973 38.526 1974 37.959 1975 37.566 1976 37.455 1977 37.768 1978 38.039 1979 37.717 1980 37.167 1981 36.489 1982 36.337 1983 36.204 1984 35.632 1985 34.888 1986 34.22 1987 34.155 1988 34.013 1989 33.342 1990 33.265 1991 33.177 1992 32.734 1993 32.108 1994 31.551 1995 31.288 1996 30.682 1997 30.166 1998 29.776 1999 29.318 2000 28.769 2001 28.84 2002 28.398 2003 27.986 2004 27.466 2005 27.019 2006 26.924 2007 26.607 2008 26.357 2009 26.148 2010 25.511 2011 24.416 2012 24.457 2013 24.286 2014 23.827 2015 23.252 2016 22.836 2017 22.664 2018 22.445 2019 22.254 2020 22.039 2021 21.813 2022 21.618