Year per Person 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0 1986 1.4952 1987 9.56854 1988 12.70415 1989 15.46436 1990 18.28807 1991 23.021 1992 21.87394 1993 20.79461 1994 19.83865 1995 19.02549 1996 18.34444 1997 17.76366 1998 17.25138 1999 16.77301 2000 16.30699 2001 15.84997 2002 15.40675 2003 14.97697 2004 14.56172 2005 14.1614 2006 13.77484 2007 13.40053 2008 13.03802 2009 12.64901 2010 12.01307 2011 11.25733 2012 10.61756 2013 9.88629 2014 9.21935 2015 8.9033 2016 8.68769