Year per 1,000 people 1960 42.615 1961 41.9 1962 41.176 1963 40.452 1964 39.745 1965 39.092 1966 38.448 1967 37.776 1968 37.057 1969 36.49 1970 35.939 1971 35.126 1972 34.653 1973 34.235 1974 33.575 1975 32.936 1976 32.401 1977 31.924 1978 31.55 1979 31.226 1980 30.774 1981 31.098 1982 31.247 1983 31.257 1984 31.091 1985 30.773 1986 30.405 1987 30.092 1988 29.851 1989 29.515 1990 29.117 1991 28.717 1992 28.731 1993 28.598 1994 28.382 1995 28.135 1996 27.752 1997 27.337 1998 26.893 1999 26.357 2000 25.772 2001 25.149 2002 24.516 2003 23.9 2004 23.426 2005 22.994 2006 22.608 2007 22.295 2008 22.031 2009 21.832 2010 21.705 2011 21.621 2012 21.544 2013 21.502 2014 21.423 2015 21.31 2016 21.139 2017 20.958 2018 20.77 2019 20.828 2020 20.473 2021 20.298 2022 19.897