Consolidated Statements of Changes in Shareholders' Equity

Years ended December 31 (millions of C$) 2010 2009 2008
Common shares      
Balance at beginning of year 2,374 2,372 2,437
Issued on exercise of stock options 97 2 3
Shares purchased and held in trust for PSU plans (note 13) (82) (68)
Shares released from trust for 2008 PSU plan (note 13) 68
Balance at end of year 2,457 2,374 2,372
Contributed surplus      
Balance at beginning of year 153 84 64
Stock‑based compensation (recovery) (note 13) (21) 69 20
Balance at end of year 132 153 84
Retained earnings      
Balance at beginning of year 9,174 8,966 5,651
Net income 648 437 3,519
Common share dividends (254) (229) (204)
Balance at end of year 9,568 9,174 8,966
Accumulated other comprehensive loss      
Balance at beginning of year (590) (272) (189)
Other comprehensive loss (1,088) (318) (83)
Balance at end of year (1,678) (590) (272)

See accompanying notes.