Exhibit 99(b)

Examples of Wholesale Energy, Fuel and Emission Allowance Price Fluctuations

2002 through 2006

Wholesale Energy:

PJM West Hub* Power Price - $/MWh

Year	High	Month	Low	Month
2002	$    733.72	July	$     0.00**	Feb., March, April, May, June, July, Aug., Sept.
2003	$    252.38	March	$     0.00**	Jan., May, June, July, Aug., Sept.
2004	$    181.66	December	$     0.00**	Jan., June, July, Aug., Sept., Oct.
2005	$    315.65	July	$     0.00**	Jan., April, May, June, July, Sept.
2006	$    769.90	August	$     0.00**	April, May, June, July, Aug., Nov., Dec.

*A common trading hub for PJM.

**Occurs during times of low demand for electricity when generation levels of generating units are reduced to their normal minimums.

Mid-C* Power Price - $/MWh

Year	High	Month	Low	Month
2002	$     46.00	March	$       1.21	July
2003	$   113.89	February	$       9.13	May
2004	$     65.06	July	$     10.21	June
2005	$   139.76	December	$       7.68	May
2006	$   189.87	July	$     (2.00)	May

*A common trading hub for Northwestern U.S.

Fuel:

NYMEX Coal (1% sulfur content, 12,000 Btu) Price - $/ton

Year	High	Month	Low	Month
2002	$     30.00	December	$     23.10	February
2003	$     39.92	December	$     27.75	March
2004	$     63.00	August	$     39.67	January
2005	$     62.75	September	$     51.10	June
2006	$     58.75	January	$     37.50	November

NYMEX Natural Gas Price - $/million Btu

Year	High	Month	Low	Month
2002	$       5.34	December	$       1.91	January
2003	$       9.58	February	$       2.66	August
2004	$       8.73	November	$       4.57	September
2005	$     15.38	December	$       5.83	January
2006	$     10.63	January	$       4.20	September

Residual Oil (1% sulfur content) Price @ NY Harbor - $/barrel

Year	High	Month	Low	Month
2002	$     29.10	December	$     14.03	February
2003	$     43.62	March	$     23.00	April
2004	$     35.38	October	$     22.12	December
2005	$     54.38	October	$     26.88	January
2006	$     54.25	April	$     35.00	October

Sulfur Dioxide Emission Allowances:

SO2 Emission Allowance Price - $/allowance

Year	High	Month	Low	Month
2002	$        177	March	$        126	November
2003	$        221	December	$        135	January
2004	$        730	November	$        210	January
2005	$     1,610	December	$        640	January
2006	$     1,598	January	$        445	November