Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: table of contents part ii , item 8 schlumberger limited ( schlumberger n.v. , incorporated in the netherlands antilles ) and subsidiary companies shares of common stock issued treasury shares outstanding . <table class='wikitable'><tr><td>1</td><td>-</td><td>issued</td><td>in treasury</td><td>shares outstanding</td></tr><tr><td>2</td><td>balance january 1 2001</td><td>667085793</td><td>-94361099 ( 94361099 )</td><td>572724694</td></tr><tr><td>3</td><td>employee stock purchase plan</td><td>2013</td><td>1752833</td><td>1752833</td></tr><tr><td>4</td><td>shares granted to directors</td><td>2013</td><td>4800</td><td>4800</td></tr><tr><td>5</td><td>shares sold to optionees</td><td>8385</td><td>1399686</td><td>1408071</td></tr><tr><td>6</td><td>balance december 31 2001</td><td>667094178</td><td>-91203780 ( 91203780 )</td><td>575890398</td></tr><tr><td>7</td><td>employee stock purchase plan</td><td>2013</td><td>2677842</td><td>2677842</td></tr><tr><td>8</td><td>shares granted to directors</td><td>2013</td><td>3500</td><td>3500</td></tr><tr><td>9</td><td>shares sold to optionees</td><td>10490</td><td>2243400</td><td>2253890</td></tr><tr><td>10</td><td>acquisition of technoguide</td><td>2013</td><td>1347485</td><td>1347485</td></tr><tr><td>11</td><td>balance december 31 2002</td><td>667104668</td><td>-84931553 ( 84931553 )</td><td>582173115</td></tr><tr><td>12</td><td>employee stock purchase plan</td><td>2013</td><td>2464088</td><td>2464088</td></tr><tr><td>13</td><td>shares granted to directors</td><td>2013</td><td>3500</td><td>3500</td></tr><tr><td>14</td><td>shares sold to optionees</td><td>1320</td><td>1306305</td><td>1307625</td></tr><tr><td>15</td><td>balance december 31 2003</td><td>667105988</td><td>-81157660 ( 81157660 )</td><td>585948328</td></tr></table> see the notes to consolidated financial statements 39 / slb 2003 form 10-k .
Question: what were the number of shares issued to directors in 2001?
Answer: 4800.0
Question: what was the number in 2002?
Answer: 3500.0
Question: what is the sum number of shares?
Answer: 8300.0
Question: what was the number of issued shares in 2003?

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3500.0
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