EXHIBIT 11 — COMPUTATION OF EARNINGS PER SHARE

In thousands of dollars, except per share data

			Three Months Ended March 31,
			2003			2002
Numerator:
	Income before cumulative effect of a change in accounting principle		$	71,046		$	90,329
	Cumulative effect of a change in accounting principle			—			(16,778,526	)
	Net income (loss)			71,046			(16,688,197	)
	Effect of dilutive securities:
		Convertible debt – 2.625% issued in 1998		2,106	*		2,339	*
		Convertible debt – 1.5% issued in 1999		—			2,325	*
		LYONS – 1998 issue		1,216	*		1,184	*
		Less: Anti-dilutive items		(3,322	)		(5,848	)
Numerator for net income before cumulative effect of a change in accounting principle per common share – diluted				71,046			90,329
Numerator for cumulative effect of a change in accounting principle per common share – diluted				—			(16,778,526	)
Numerator for net loss per common share – diluted			$	71,046		$	(16,688,197	)
Denominator:
	Weighted average common shares			613,557			599,195
	Effect of dilutive securities:
		Stock options and common stock warrants		2,960			4,963
		Convertible debt – 2.625% issued in 1998		8,355	*		9,282	*
		Convertible debt – 1.5% issued in 1999		—			9,454	*
		LYONS – 1998 issue		3,046	*		3,085	*
		Less: Anti-dilutive items		(11,401	)		(21,821	)
Denominator for net income (loss) per common share – diluted				616,517			604,158
Net income (loss) per common share:
	Basic:
		Income before cumulative effect of a change in accounting principle	$	.12		$	.15
		Cumulative effect of a change in accounting principle		—			(28.00	)
		Net income (loss)	$	.12		$	(27.85	)
	Diluted:
		Income before cumulative effect of a change in accounting principle	$	.12		$	.15
		Cumulative effect of a change in accounting principle		—			(27.76	)
		Net income (loss)	$	.12		$	(27.61	)

* Denotes items that are anti-dilutive to the calculation of earnings per share.