Notes to Consolidated Financial Statements

Note 10 Quarterly Financial Data (Unaudited)

Our quarterly financial data for 2009, 2008 and 2007 are summarized below. The variance in our quarterly earnings is the result of the seasonal nature of our primary business.

In millions, except per share amounts
March 31
June 30
Sept. 30
Dec. 31
2009
Operating revenues
$ 995
$ 377
$ 307
$ 638
Operating income
230
55
43
148
Net income attributable to AGL Resources Inc.
119
20
12
71
Basic earnings per common share attributable to AGL Resources Inc. common shareholders 
1.55
0.26
0.16
0.92
Diluted earnings per common share attributable to AGL Resources Inc. common shareholders 
1.55
0.26
0.16
0.92
2008
Operating revenues
$1,012
$ 444
$ 539
$ 805
Operating income
188
6
126
158
Net income (loss) attributable to AGL Resources Inc.
89
(11)
65
74
Basic earnings (loss) per common share attributable to AGL Resources Inc. common shareholders 
1.17
(0.15)
0.85
0.97
Diluted earnings (loss) per share attributable to AGL Resources Inc. common shareholders 
1.16
(0.15)
0.85
0.97
2007
Operating revenues
$ 973
$ 467
$ 369
$ 685
Operating income
216
78
55
140
Net income attributable to AGL Resources Inc.
102
30
13
66
Basic earnings per common share attributable to AGL Resources Inc. common shareholders 
1.31
0.40
0.17
0.86
Diluted earnings per common share attributable to
AGL Resources Inc. common shareholders
1.30
0.40
0.17
0.86


Our basic and diluted earnings per common share are calculated based on the weighted daily average number of common shares and common share equivalents outstanding during the quarter. Those totals differ from the basic and diluted earnings per common share attributable to AGL Resources Inc. common shareholders shown in the consolidated statements of income, which are based on the weighted average number of common shares and common share equivalents outstanding during the entire year.