Year per 1,000 people 1960 46.014 1961 46.413 1962 44.139 1963 42.033 1964 40.255 1965 38.872 1966 37.938 1967 37.469 1968 37.418 1969 37.687 1970 38.167 1971 38.538 1972 38.639 1973 38.61 1974 38.522 1975 38.915 1976 39.515 1977 39.961 1978 40.458 1979 40.537 1980 40.637 1981 40.555 1982 40.19 1983 40.213 1984 40.19 1985 40.237 1986 40.333 1987 40.245 1988 40.224 1989 40.201 1990 40.119 1991 39.943 1992 39.669 1993 39.409 1994 39.125 1995 38.876 1996 38.716 1997 38.592 1998 38.761 1999 39.035 2000 39.438 2001 39.941 2002 39.85 2003 39.633 2004 39.396 2005 39.075 2006 38.672 2007 38.241 2008 37.81 2009 37.336 2010 36.873 2011 36.628 2012 36.148 2013 35.159 2014 34.032 2015 32.754 2016 31.602 2017 30.41 2018 29.535 2019 28.917 2020 28.435 2021 28.263 2022 27.974