Year per Person 1980 57.83931 1981 55.26126 1982 62.57945 1983 59.24208 1984 56.07053 1985 53.31264 1986 51.64605 1987 48.83914 1988 51.02903 1989 49.87753 1990 48.42784 1991 47.25708 1992 46.16738 1993 45.16189 1994 47.9911 1995 47.09111 1996 50.08668 1997 51.11548 1998 50.87168 1999 50.16086 2000 49.48841 2001 48.84851 2002 48.23339 2003 49.67116 2004 49.02425 2005 50.27656 2006 49.548 2007 48.51534 2008 47.73511 2009 46.92075 2010 46.07389 2011 45.19555 2012 44.29768 2013 43.40486 2014 42.5451 2015 41.73605 2016 40.98108