Year per Person 1980 14.22515 1981 13.67601 1982 16.0895 1983 15.5168 1984 14.96361 1985 14.42354 1986 25.1694 1987 24.58865 1988 24.63674 1989 27.4524 1990 26.82902 1991 31.31193 1992 33.37186 1993 32.25617 1994 29.47157 1995 28.94693 1996 28.24364 1997 27.61298 1998 27.15796 1999 26.48854 2000 30.20302 2001 33.23223 2002 34.9552 2003 34.47308 2004 34.75799 2005 33.37151 2006 32.86001 2007 32.529 2008 31.67863 2009 30.84671 2010 29.38511 2011 28.5985 2012 27.53518 2013 26.74974 2014 27.15395 2015 26.24917 2016 25.57062