Year per 1,000 people 1960 49.375 1961 49.569 1962 49.594 1963 49.654 1964 49.627 1965 49.546 1966 49.506 1967 49.351 1968 49.357 1969 49.506 1970 49.653 1971 49.825 1972 49.783 1973 49.8 1974 49.926 1975 49.818 1976 49.496 1977 49.337 1978 49.09 1979 48.585 1980 48.108 1981 47.698 1982 47.425 1983 47.192 1984 46.496 1985 46.051 1986 45.402 1987 44.965 1988 44.583 1989 44.213 1990 43.782 1991 43.476 1992 43.083 1993 42.755 1994 42.476 1995 42.453 1996 42.504 1997 42.537 1998 42.389 1999 42.223 2000 42.131 2001 42.12 2002 41.871 2003 41.838 2004 41.96 2005 42.069 2006 41.747 2007 41.143 2008 40.668 2009 40.183 2010 39.729 2011 39.076 2012 38.329 2013 38.721 2014 38.893 2015 38.741 2016 38.379 2017 38.058 2018 37.525 2019 37.113 2020 36.651 2021 36.21 2022 35.811