Year per 1,000 people 1960 6.714 1961 6.755 1962 6.423 1963 5.972 1964 5.914 1965 6.33 1966 5.866 1967 5.635 1968 5.62 1969 5.343 1970 5.026 1971 5.088 1972 5.034 1973 4.976 1974 4.936 1975 4.886 1976 4.773 1977 4.689 1978 4.579 1979 4.46 1980 4.323 1981 4.145 1982 3.881 1983 3.742 1984 3.479 1985 3.402 1986 3.068 1987 2.988 1988 2.785 1989 2.785 1990 2.748 1991 2.448 1992 2.667 1993 2.727 1994 2.803 1995 2.911 1996 3.038 1997 3.184 1998 3.354 1999 3.547 2000 3.63 2001 3.603 2002 3.57 2003 3.546 2004 3.525 2005 3.527 2006 3.542 2007 3.569 2008 3.602 2009 3.652 2010 3.718 2011 3.72 2012 3.847 2013 4.068 2014 3.862 2015 4.257 2016 4.345 2017 4.747 2018 4.176 2019 4.661 2020 4.788 2021 4.911 2022 5.101