Year per Person 1980 21.00247 1981 16.34822 1982 20.74009 1983 23.5538 1984 28.49486 1985 25.94534 1986 17.48552 1987 24.31748 1988 23.69296 1989 23.91882 1990 18.20506 1991 15.75069 1992 14.0309 1993 19.34509 1994 29.21583 1995 29.87438 1996 34.32695 1997 35.25487 1998 35.45412 1999 43.18684 2000 49.54593 2001 52.20433 2002 69.08236 2003 65.94694 2004 65.32347 2005 63.02884 2006 60.82073 2007 58.69094 2008 56.66769 2009 57.46457 2010 55.44922 2011 50.99815 2012 68.84637 2013 66.45727 2014 63.83126 2015 57.65565 2016 54.757