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:
| Rider | Manufacturer | Laps | Time | Grid |
| --- | --- | --- | --- | --- |
| Simone Corsi | Aprilia | 20.0 | 39:59.020 | 8.0 |
| Gabor Talmacsi | Aprilia | 20.0 | +0.019 | 2.0 |
| Pol Espargaro | Derbi | 20.0 | +0.036 | 4.0 |
| Mike Di Meglio | Derbi | 20.0 | +0.135 | 3.0 |
| Bradley Smith | Aprilia | 20.0 | +0.178 | 7.0 |
| Sergio Gadea | Aprilia | 20.0 | +0.490 | 5.0 |
| Nicolas Terol | Aprilia | 20.0 | +0.832 | 9.0 |
| Sandro Cortese | Aprilia | 20.0 | +3.865 | 6.0 |
| Joan Olivé | Derbi | 20.0 | +3.928 | 14.0 |
| Stefan Bradl | Aprilia | 20.0 | +5.439 | 11.0 |
| Steve Bonsey | Aprilia | 20.0 | +10.244 | 13.0 |
| Andrea Iannone | Aprilia | 20.0 | +10.447 | 12.0 |
| Raffaele De Rosa | KTM | 20.0 | +18.366 | 1.0 |
| Scott Redding | Aprilia | 20.0 | +23.201 | 16.0 |
| Michael Ranseder | Aprilia | 20.0 | +24.440 | 18.0 |
| Takaaki Nakagami | Aprilia | 20.0 | +26.631 | 15.0 |
| Randy Krummenacher | KTM | 20.0 | +30.629 | 19.0 |
| Efren Vazquez | Aprilia | 20.0 | +30.730 | 25.0 |
| Marc Marquez | KTM | 20.0 | +33.868 | 23.0 |
| Lorenzo Zanetti | KTM | 20.0 | +36.928 | 31.0 |
| Pere Tutusaus | Aprilia | 20.0 | +49.951 | 32.0 |
| Lorenzo Savadori | Aprilia | 20.0 | +50.038 | 22.0 |
| Jules Cluzel | Loncin | 20.0 | +50.040 | 24.0 |
| Dominique Aegerter | Derbi | 20.0 | +50.052 | 26.0 |
| Esteve Rabat | KTM | 20.0 | +56.360 | 20.0 |
| Riccardo Moretti | Honda | 20.0 | +1:06.247 | 35.0 |
| Alexis Masbou | Loncin | 20.0 | +1:06.566 | 38.0 |
| Robin Lasser | Aprilia | 20.0 | +1:06.982 | 33.0 |
| Hugo Van Den Berg | Aprilia | 20.0 | +1:09.266 | 28.0 |
| Luca Vitali | Aprilia | 20.0 | +1:10.551 | 38.0 |
| Gabriele Ferro | Honda | 20.0 | +1:10.567 | 34.0 |
| Louis Rossi | Honda | 20.0 | +1:36.451 | 37.0 |
| Ferrucio Lamborghini | Aprilia | 20.0 | +1:39.883 | 36.0 |
| Robert Muresan | Aprilia | 18.0 | +2 Laps | 30.0 |
| Danny Webb | Aprilia | 19.0 | Accident | 17.0 |
| Tomoyoshi Koyama | KTM | 16.0 | Retirement | 10.0 |
| Roberto Lacalendola | Aprilia | 11.0 | Retirement | 29.0 |
| Pablo Nieto | KTM | 8.0 | Retirement | 27.0 |
| Stefano Bianco | Aprilia | 2.0 | Accident | 21.0 |
Question:
What are the average Laps on Grid 15?
Answer:
20.0