Average annual household percent expenditure share, total energy, South region, 1984-2006 Year Percent of total expenditures 1984 10.1 1985 9.1 1986 8.8 1987 8.6 1988 8.5 1989 8.3 1990 8.5 1991 7.9 1992 7.9 1993 7.8 1994 7.8 1995 7.6 1996 7.7 1997 7.6 1998 7.3 1999 7.1 2000 7.7 2001 7.8 2002 7.2 2003 7.6 2004 8.2 2005 9.0 2006 9.7