Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Sd | Rk | Player | Points | Points defending | Points won | New points | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | 1.0 | Caroline Wozniacki | 8035.0 | 280.0 | 900.0 | 8655.0 | Semifinals lost to Li Na |
| 2.0 | 2.0 | Vera Zvonareva | 6785.0 | 280.0 | 900.0 | 7405.0 | Semifinals lost to Kim Clijsters |
| 3.0 | 3.0 | Kim Clijsters | 6675.0 | 160.0 | 2000.0 | 8515.0 | Champion, won against Li Na |
| 4.0 | 5.0 | Venus Williams | 4985.0 | 500.0 | 160.0 | 4645.0 | Third round lost to Andrea Petkovic |
| 5.0 | 6.0 | Samantha Stosur | 4982.0 | 280.0 | 160.0 | 4862.0 | Third round lost to Petra Kvitová |
| 6.0 | 7.0 | Francesca Schiavone | 4835.0 | 280.0 | 500.0 | 5055.0 | Quarterfinals lost to Caroline Wozniacki |
| 7.0 | 8.0 | Jelena Janković | 4445.0 | 160.0 | 100.0 | 4385.0 | Second round lost to Peng Shuai |
| 8.0 | 10.0 | Victoria Azarenka | 4155.0 | 500.0 | 280.0 | 3935.0 | Fourth round lost to Li Na |
| 9.0 | 11.0 | Li Na | 3950.0 | 900.0 | 1400.0 | 4450.0 | Final lost to Kim Clijsters |
| 10.0 | 12.0 | Shahar Pe'er | 3225.0 | 160.0 | 160.0 | 3225.0 | Third round lost to Flavia Pennetta |
| 11.0 | 13.0 | Justine Henin | 3215.0 | 1400.0 | 160.0 | 1975.0 | Third round lost to Svetlana Kuznetsova |
| 12.0 | 14.0 | Agnieszka Radwańska | 3000.0 | 160.0 | 500.0 | 3340.0 | Quarterfinals lost to Kim Clijsters |
| 13.0 | 15.0 | Nadia Petrova | 2702.0 | 500.0 | 160.0 | 2362.0 | Third round lost to Ekaterina Makarova |
| 14.0 | 16.0 | Maria Sharapova | 2661.0 | 5.0 | 280.0 | 2936.0 | Fourth round lost Andrea Petkovic |
| 15.0 | 17.0 | Marion Bartoli | 2655.0 | 160.0 | 100.0 | 2595.0 | Second round lost to Vesna Manasieva |
| 16.0 | 18.0 | Anastasia Pavlyuchenkova | 2585.0 | 100.0 | 160.0 | 2645.0 | Third round lost to Iveta Benešová |
| 17.0 | 19.0 | Aravane Rezaï | 2445.0 | 100.0 | 5.0 | 2350.0 | First round lost to Barbora Záhlavová-Strýcová |
| 18.0 | 20.0 | Maria Kirilenko | 2540.0 | 500.0 | 100.0 | 2140.0 | Second round lost to Iveta Benešová |
| 19.0 | 21.0 | Ana Ivanovic | 2500.0 | 100.0 | 5.0 | 2405.0 | First round lost to Ekaterina Makarova |
| 20.0 | 22.0 | Kaia Kanepi | 2460.0 | 100.0 | 100.0 | 2460.0 | Second round lost to Julia Görges |
| 21.0 | 23.0 | Yanina Wickmayer | 2370.0 | 280.0 | 100.0 | 2190.0 | Second round lost to Anastasija Sevastova |
| 22.0 | 24.0 | Flavia Pennetta | 2355.0 | 100.0 | 280.0 | 2535.0 | Fourth round lost to Petra Kvitová |
| 23.0 | 25.0 | Svetlana Kuznetsova | 2310.0 | 280.0 | 280.0 | 2310.0 | Fourth round lost to Francesca Schiavone |
| 24.0 | 26.0 | Alisa Kleybanova | 2420.0 | 160.0 | 100.0 | 2360.0 | Second round lost to Simona Halep |
| 25.0 | 28.0 | Petra Kvitová | 2018.0 | 100.0 | 500.0 | 2418.0 | Quarterfinals lost to Vera Zvonareva |
| 26.0 | 29.0 | María José Martínez Sánchez | 2010.0 | 100.0 | 100.0 | 2010.0 | Second round lost to Alizé Cornet |
| 27.0 | 30.0 | Alexandra Dulgheru | 2000.0 | 5.0 | 5.0 | 2000.0 | First round lost to Ayumi Morita |
| 28.0 | 31.0 | Daniela Hantuchová | 1945.0 | 160.0 | 5.0 | 1790.0 | First round lost to Regina Kulikova |
| 29.0 | 32.0 | Dominika Cibulková | 1905.0 | 5.0 | 160.0 | 2060.0 | Third round lost to Caroline Wozniacki |
| 30.0 | 33.0 | Andrea Petkovic | 1890.0 | 100.0 | 500.0 | 2290.0 | Quarterfinals lost to Li Na |
| 31.0 | 34.0 | Lucie Šafářová | 1780.0 | 5.0 | 160.0 | 1935.0 | Third round lost to Vera Zvonareva |
Question:
What is the highest sd when the status is second round lost to iveta benešová?
Answer:
18.0