Year per Person 1970 0.59882 1971 0.56334 1972 0.54401 1973 0.65158 1974 0.66969 1975 0.63349 1976 0.76366 1977 0.81067 1978 0.79561 1979 0.86688 1980 0.86842 1981 0.84997 1982 0.88318 1983 0.84707 1984 0.91278 1985 0.89062 1986 0.95539 1987 0.90727 1988 0.90548 1989 0.90694 1990 0.99532 1991 0.9695 1992 0.93543 1993 0.98742 1994 1.02217 1995 1.11548 1996 1.18136 1997 1.20064 1998 1.23473 1999 1.02665 2000 1.02628 2001 1.06756 2002 1.00651 2003 0.87759 2004 0.97105 2005 0.92133 2006 1.04019 2007 1.17709 2008 1.0478 2009 0.97638 2010 0.94932 2011 0.84312 2012 0.88746 2013 0.84412 2014 0.8385 2015 0.93664 2016 0.97773