The total net electricity consumption of the US. by year from 1980 to 2007 (in billion kilowatt-hours) follows. Net consumption excludes the energy consumed by the gener ating units. Read left to right. 1980 20944 1981 2147.1 1982 2086.4 1983 2151.0 1984 2285.8 1985 2324.0 1986 2368.8 1987 2457.3 1988 2578.1 1989 2755.6 1990 2837.1 1991 2886.1 1992 2897.2 1993 3000.7 1994 3080.9 1995 3164.0 1996 3253.8 1997 3301.8 1998 3425.1 1999 3483.7 2000 3592.4 2001 3557.1 2002 3631.7 2003 3662.0 2004 3715.9 2005 3811.0 2006 3816.8 2007 3891.7 (source: U.S. Department of Energy Web site, http://www.eia.doc. gov/men/international contents html#InternationalElectricity)

Construct a time series plot of these data. Construct and inter- pret a stem-and-leaf display of these data