Chart 6

Tight global capacity could lead to further energy price spikes.
Year	Excess capacity as percent of total capacity
1970	7.7
1971	7.9
1972	7.5
1973	4.6
1974	6.5
1975	11.8
1976	6.6
1977	7.0
1978	9.2
1979	5.6
1980	8.1
1981	10.5
1982	13.8
1983	14.5
1984	13.4
1985	14.7
1986	11.8
1987	11.4
1988	8.7
1989	7.5
1990	4.6
1991	1.7
1992	2.7
1993	4.1
1994	4.3
1995	4.2
1996	3.9
1997	4.1
1998	4.1
1999	6.3
2000	3.9
2001	5.0
2002	6.8
2003	2.2
2004	1.2
2005f	1.4
2006f	0.6
2007f	0.6

Source: Energy Information Agency