Year per Person 1980 11.94058 1981 11.08188 1982 10.04714 1983 9.0279 1984 8.21269 1985 10.51782 1986 9.1143 1987 7.64411 1988 6.34387 1989 5.09957 1990 4.0231 1991 18.45724 1992 17.94351 1993 17.22137 1994 16.54686 1995 15.95028 1996 15.35246 1997 14.87222 1998 14.42688 1999 14.05237 2000 13.62519 2001 13.18223 2002 12.80733 2003 12.63293 2004 12.2967 2005 26.37299 2006 26.60526 2007 26.86808 2008 26.67008 2009 26.45267 2010 26.20215 2011 4.83419 2012 4.55103 2013 4.5744 2014 4.95676 2015 4.98073 2016 5.00554