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 .                              | issued    | in treasury            | shares outstanding
balance january 1 2001       | 667085793 | -94361099 ( 94361099 ) | 572724694         
employee stock purchase plan | 2013      | 1752833                | 1752833           
shares granted to directors  | 2013      | 4800                   | 4800              
shares sold to optionees     | 8385      | 1399686                | 1408071           
balance december 31 2001     | 667094178 | -91203780 ( 91203780 ) | 575890398         
employee stock purchase plan | 2013      | 2677842                | 2677842           
shares granted to directors  | 2013      | 3500                   | 3500              
shares sold to optionees     | 10490     | 2243400                | 2253890           
acquisition of technoguide   | 2013      | 1347485                | 1347485           
balance december 31 2002     | 667104668 | -84931553 ( 84931553 ) | 582173115         
employee stock purchase plan | 2013      | 2464088                | 2464088           
shares granted to directors  | 2013      | 3500                   | 3500              
shares sold to optionees     | 1320      | 1306305                | 1307625           
balance december 31 2003     | 667105988 | -81157660 ( 81157660 ) | 585948328          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?
Steps: Ask for number 4800
Answer: 4800.0
Question: what was the number in 2002?

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.
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 .                              | issued    | in treasury            | shares outstanding
balance january 1 2001       | 667085793 | -94361099 ( 94361099 ) | 572724694         
employee stock purchase plan | 2013      | 1752833                | 1752833           
shares granted to directors  | 2013      | 4800                   | 4800              
shares sold to optionees     | 8385      | 1399686                | 1408071           
balance december 31 2001     | 667094178 | -91203780 ( 91203780 ) | 575890398         
employee stock purchase plan | 2013      | 2677842                | 2677842           
shares granted to directors  | 2013      | 3500                   | 3500              
shares sold to optionees     | 10490     | 2243400                | 2253890           
acquisition of technoguide   | 2013      | 1347485                | 1347485           
balance december 31 2002     | 667104668 | -84931553 ( 84931553 ) | 582173115         
employee stock purchase plan | 2013      | 2464088                | 2464088           
shares granted to directors  | 2013      | 3500                   | 3500              
shares sold to optionees     | 1320      | 1306305                | 1307625           
balance december 31 2003     | 667105988 | -81157660 ( 81157660 ) | 585948328          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?
Steps: Ask for number 4800
Answer: 4800.0
Question: what was the number in 2002?
