2010

2009

2008

(in thousands, except per share results)

Net income available for common stockholders

$

1,099,390

$

1,039,675

$

647,154

Weighted-average outstanding shares of common stock used to compute basic earnings per common share

167,782

167,364

167,172

Dilutive effect of:

Employee stock options

676

677

1,173

Restricted stock awards

1,340

1,030

842

Shares used to compute diluted earnings per common share

169,798

169,071

169,187

Basic earnings per common share

$

6.55

$

6.21

$

3.87

Diluted earnings per common share

$

6.47

$

6.15

$

3.83