MCWCCITY = Midwest - Chicago Citygate
Trade Date Issue Date MCWCCITY
12/15/03	12/16/03	$6.66
12/16/03	12/17/03	$6.56
12/17/03	12/18/03	$6.56
12/18/03	12/19/03	$6.94
12/19/03	12/22/03	$6.74
12/22/03	12/23/03	$6.20
12/23/03	12/24/03	$5.45
12/24/03	12/29/03	$5.42
12/29/03	12/30/03	$5.54
12/30/03	12/31/03	$6.02
12/31/03	1/5/04	$5.86
1/5/04	1/6/04	$6.64
1/6/04	1/7/04	$7.02
1/7/04	1/8/04	$6.56
1/8/04	1/9/04	$6.42
1/9/04	1/12/04	$6.81
1/12/04	1/13/04	$5.99
1/13/04	1/14/04	$6.00
1/14/04	1/15/04	$5.76
1/15/04	1/16/04	$5.98
1/16/04	1/20/04	$5.58
1/20/04	1/21/04	$6.10
1/21/04	1/22/04	$6.27
1/22/04	1/23/04	$5.99
1/23/04	1/26/04	$5.94
1/26/04	1/27/04	$5.82
1/27/04	1/28/04	$6.06
1/28/04	1/29/04	$6.57
1/29/04	1/30/04	$6.17
1/30/04	2/2/04	$5.80
2/2/04	2/3/04	$5.49
2/3/04	2/4/04	$5.75
2/4/04	2/5/04	$5.82
2/5/04	2/6/04	$5.59
2/6/04	2/9/04	$5.43
2/9/04	2/10/04	$5.50
2/10/04	2/11/04	$5.39
2/11/04	2/12/04	$5.32
2/12/04	2/13/04	$5.35
2/13/04	2/17/04	$5.59
2/17/04	2/18/04	$5.31
2/18/04	2/19/04	$5.24
2/19/04	2/20/04	$5.24
2/20/04	2/23/04	$5.19
2/23/04	2/24/04	$5.07
2/24/04	2/25/04	$5.01
2/25/04	2/26/04	$5.07
Notes : Prices are in U.S. $/MMBtu dry gas. Prices are for gas traded on the dates shown for incremental delivery.