Year per 1,000 people 1960 46.838 1961 46.76 1962 46.771 1963 46.919 1964 47.182 1965 47.52 1966 47.839 1967 48.065 1968 47.885 1969 47.211 1970 46.694 1971 46.873 1972 47.658 1973 48.533 1974 49.634 1975 50.192 1976 50.582 1977 50.75 1978 50.782 1979 50.621 1980 50.311 1981 50.02 1982 49.659 1983 49.255 1984 48.734 1985 48.097 1986 47.329 1987 46.409 1988 45.004 1989 43.537 1990 42.246 1991 41.165 1992 40.12 1993 39.317 1994 38.613 1995 37.792 1996 36.973 1997 36.21 1998 35.696 1999 35.291 2000 34.976 2001 34.796 2002 34.563 2003 34.463 2004 34.375 2005 34.197 2006 33.883 2007 33.323 2008 32.48 2009 31.481 2010 30.129 2011 28.631 2012 27.379 2013 26.187 2014 25.006 2015 23.947 2016 23.016 2017 22.268 2018 21.514 2019 20.744 2020 20.006 2021 19.28 2022 18.524