the stock repurchase program reduced shares outstanding by how many million shares in the period?
Important information:
table_5: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -27 ( 27 ) ; the stock repurchase program of shares outstanding is -27 ( 27 ) ;
table_11: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -37 ( 37 ) ; the stock repurchase program of shares outstanding is -37 ( 37 ) ;
table_15: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -14 ( 14 ) ; the stock repurchase program of shares outstanding is -14 ( 14 ) ;
Reasoning Steps:
Step: add2-1(27, 37) = 64
Program:
add(27, 37)
Program (Nested):
add(27, 37)

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
schlumberger limited and subsidiaries shares of common stock ( stated in millions ) issued in treasury shares outstanding .
Table
                                                 | issued | in treasury  | shares outstanding
balance january 1 2010                           | 1334   | -139 ( 139 ) | 1195              
acquisition of smith international inc .         | 100    | 76           | 176               
shares sold to optionees less shares exchanged   | 2013   | 6            | 6                 
shares issued under employee stock purchase plan | 2013   | 3            | 3                 
stock repurchase program                         | 2013   | -27 ( 27 )   | -27 ( 27 )        
issued on conversions of debentures              | 2013   | 8            | 8                 
balance december 31 2010                         | 1434   | -73 ( 73 )   | 1361              
shares sold to optionees less shares exchanged   | 2013   | 6            | 6                 
vesting of restricted stock                      | 2013   | 1            | 1                 
shares issued under employee stock purchase plan | 2013   | 3            | 3                 
stock repurchase program                         | 2013   | -37 ( 37 )   | -37 ( 37 )        
balance december 31 2011                         | 1434   | -100 ( 100 ) | 1334              
shares sold to optionees less shares exchanged   | 2013   | 4            | 4                 
shares issued under employee stock purchase plan | 2013   | 4            | 4                 
stock repurchase program                         | 2013   | -14 ( 14 )   | -14 ( 14 )        
balance december 31 2012                         | 1434   | -106 ( 106 ) | 1328              
see the notes to consolidated financial statements .
Question: 
the stock repurchase program reduced shares outstanding by how many million shares in the period?
Important information:
table_5: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -27 ( 27 ) ; the stock repurchase program of shares outstanding is -27 ( 27 ) ;
table_11: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -37 ( 37 ) ; the stock repurchase program of shares outstanding is -37 ( 37 ) ;
table_15: the stock repurchase program of issued is 2013 ; the stock repurchase program of in treasury is -14 ( 14 ) ; the stock repurchase program of shares outstanding is -14 ( 14 ) ;
Reasoning Steps:
Step: add2-1(27, 37) = 64
Program:
add(27, 37)
Program (Nested):
add(27, 37)
