Year per Person 1985 1.71905 1986 1.63411 1987 1.4769 1988 1.38263 1989 1.26853 1990 1.11329 1991 0.95196 1992 0.86114 1993 0.7305 1994 0.67841 1995 0.69136 1996 0.65317 1997 0.61655 1998 0.5708 1999 0.60672 2000 0.5672 2001 0.55104 2002 0.5061 2003 0.49949 2004 0.48158 2005 0.54678 2006 0.63831 2007 1.01126 2008 1.50829 2009 1.48973 2010 1.50347 2011 1.45697 2012 1.51572 2013 1.55296 2014 1.66323 2015 1.67934 2016 1.61598