.", "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