Year per Person 1980 16.65403 1981 15.06982 1982 14.8541 1983 13.97408 1984 17.57761 1985 17.31014 1986 18.16773 1987 22.88085 1988 21.21662 1989 19.70801 1990 18.09039 1991 19.87653 1992 41.28057 1993 45.58374 1994 42.5312 1995 40.36114 1996 40.31241 1997 42.02381 1998 45.99787 1999 48.71314 2000 49.31684 2001 49.13592 2002 52.79841 2003 51.93414 2004 51.08823 2005 48.32063 2006 43.60216 2007 38.41739 2008 61.53669 2009 58.79825 2010 56.2398 2011 64.7968 2012 74.15473 2013 71.33642 2014 68.61207 2015 67.58675 2016 66.59389