EXHIBIT 11 — COMPUTATION OF EARNINGS PER SHARE

	Nine Months Ended September 30,				Three Months Ended September 30,
(In thousands of dollars, except per share data)	2005		2004		2005		2004
Numerator:
Net income	$	474,089	$	631,464	$	205,475	$	261,234
Effect of dilutive securities — none
Numerator for net income per common share — diluted	$	474,089	$	631,464	$	205,475	$	261,234
Denominator:
Weighted average common shares		548,464		604,343		542,152		586,193
Effect of dilutive securities:
Stock options and common stock warrants		1,312		2,391		1,323		1,659
Denominator for net income per common share — diluted		549,776		606,734		543,475		587,852
Net income (loss) per common share:
Basic	$	.86	$	1.04	$	.38	$	.45
Diluted	$	.86	$	1.04	$	.38	$	.44