STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2011

STOCK-BASED COMPENSATION

Stock option activity

	Six months ended June 30, 2011
	# of Options			Weighted average exercise price
				(C$)
Outstanding, beginning of period		6,762,704			56.94
Granted		2,593,785			76.46
Exercised		(217,388	)		40.46
Cancelled		(91,750	)		66.87
Outstanding, end of period		9,047,351			62.83
Options exercisable at end of period		5,518,997			58.94

Schedule of weighted average assumptions under the Black-Scholes option pricing model

	2011		2010
Risk-free interest rate		1.96%		1.87%
Expected life of options (in years)		2.5		2.5
Expected volatility of the Company's share price		34.6%		44.3%
Expected dividend yield		0.88%		0.43%