pre_text: schlumberger limited and subsidiaries shares of common stock issued in treasury shares outstanding ( stated in millions ) .
post_text: see the notes to consolidated financial statements part ii , item 8 .
table: Issued In Treasury Shares Outstanding
table: Balance, January 1, 2008 1,334 (138) 1,196
table: Shares sold to optionees less shares exchanged – 5 5
table: Shares issued under employee stock purchase plan – 2 2
table: Stock repurchase program – (21) (21)
table: Issued on conversions of debentures – 12 12
table: Balance, December 31, 2008 1,334 (140) 1,194
table: Shares sold to optionees less shares exchanged – 4 4
table: Vesting of restricted stock – 1 1
table: Shares issued under employee stock purchase plan – 4 4
table: Stock repurchase program – (8) (8)
table: Balance, December 31, 2009 1,334 (139) 1,195
table: Acquisition of Smith International, Inc. 100 76 176
table: Shares sold to optionees less shares exchanged – 6 6
table: Shares issued under employee stock purchase plan – 3 3
table: Stock repurchase program – (27) (27)
table: Issued on conversions of debentures – 8 8
table: Balance, December 31, 2010 1,434 (73) 1,361
question: Analyse this data from a financial earnings document. what was the average beginning and ending balance of shares in millions outstanding during 2009?