Regional totals Periodo Total National Total 2023 8,96 National Total 2022 9,67 National Total 2021 9,47 National Total 2020 10,4 National Total 2019 8,84 National Total 2018 9,1 National Total 2017 9,07 National Total 2016 8,79 National Total 2015 9,06 National Total 2014 8,48 National Total 2013 8,34 National Total 2012 8,58 National Total 2011 8,26 National Total 2010 8,17 National Total 2009 8,26 National Total 2008 8,36 National Total 2007 8,47 National Total 2006 8,33 National Total 2005 8,82 National Total 2004 8,62 National Total 2003 9,06 National Total 2002 8,84 National Total 2001 8,77 National Total 2000 8,82 National Total 1999 9,13 National Total 1998 8,9 National Total 1997 8,67 National Total 1996 8,75 National Total 1995 8,66 National Total 1994 8,5 National Total 1993 8,59 National Total 1992 8,43 National Total 1991 8,64 National Total 1990 8,54 National Total 1989 8,33 National Total 1988 8,19 National Total 1987 7,96 National Total 1986 8,01 National Total 1985 8,11 National Total 1984 7,78 National Total 1983 7,9 National Total 1982 7,52 National Total 1981 7,75 National Total 1980 7,69 National Total 1979 7,81 National Total 1978 8,02 National Total 1977 8,04 National Total 1976 8,25 National Total 1975 8,32