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:
| Pos | No | Rider | Manufacturer | Laps | Time | Grid | Points |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 58 | Marco Simoncelli | Gilera | 25 | 39:02.553 | 1 | 25 |
| 2 | 19 | Álvaro Bautista | Aprilia | 25 | +0.223 | 3 | 20 |
| 3 | 36 | Mika Kallio | KTM | 25 | +14.450 | 2 | 16 |
| 4 | 60 | Julian Simon | KTM | 25 | +14.478 | 6 | 13 |
| 5 | 6 | Alex Debon | Aprilia | 25 | +26.226 | 8 | 11 |
| 6 | 15 | Roberto Locatelli | Gilera | 25 | +26.392 | 11 | 10 |
| 7 | 72 | Yuki Takahashi | Honda | 25 | +26.434 | 7 | 9 |
| 8 | 41 | Aleix Espargaro | Aprilia | 25 | +40.546 | 9 | 8 |
| 9 | 14 | Ratthapark Wilairot | Honda | 25 | +1:00.219 | 12 | 7 |
| 10 | 32 | Fabrizio Lai | Gilera | 25 | +1:20.825 | 13 | 6 |
| 11 | 17 | Karel Abraham | Aprilia | 25 | +1:22.802 | 17 | 5 |
| 12 | 25 | Alex Baldolini | Aprilia | 25 | +1:22.864 | 18 | 4 |
| 13 | 10 | Imre Toth | Aprilia | 25 | +1:23.995 | 16 | 3 |
| 14 | 52 | Lukas Pesek | Aprilia | 25 | +1:39.740 | 14 | 2 |
| 15 | 35 | Simone Grotzkyj | Gilera | 24 | +1 Lap | 21 | 1 |
| 16 | 92 | Daniel Arcas | Honda | 24 | +1 Lap | 20 |  |
| 17 | 45 | Doni Tata Pradita | Yamaha | 24 | +1 Lap | 22 |  |
| Ret | 4 | Hiroshi Aoyama | KTM | 15 | Retirement | 4 |  |
| Ret | 75 | Mattia Pasini | Aprilia | 15 | Accident | 10 |  |
| Ret | 55 | Héctor Faubel | Aprilia | 4 | Accident | 5 |  |
| Ret | 90 | Federico Sandi | Aprilia | 1 | Accident | 15 |  |
| Ret | 43 | Manuel Hernandez | Aprilia | 1 | Retirement | 19 |  |
| DNQ | 27 | Stefano Bianco | Gilera |  |  |  |  |
| DNQ | 89 | Ho Wan Chow | Aprilia |  |  |  |  |
Question:
the total amount of riders who did not qualify
Answer:
2