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 | Rider | Manufacturer | Laps | Time/Retired | Grid | Points |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Manuel Poggiali | Gilera | 25 | 41:18.211 | 1 | 25 |
| 2 | Dani Pedrosa | Honda | 25 | +0.019 | 4 | 20 |
| 3 | Steve Jenkner | Aprilia | 25 | +9.888 | 3 | 16 |
| 4 | Lucio Cecchinello | Aprilia | 25 | +15.397 | 5 | 13 |
| 5 | Simone Sanna | Aprilia | 25 | +15.452 | 8 | 11 |
| 6 | Joan Olivé | Honda | 25 | +15.486 | 20 | 10 |
| 7 | Stefano Bianco | Aprilia | 25 | +15.549 | 11 | 9 |
| 8 | Pablo Nieto | Aprilia | 25 | +16.218 | 2 | 8 |
| 9 | Mika Kallio | Honda | 25 | +22.762 | 10 | 7 |
| 10 | Mirko Giansanti | Honda | 25 | +22.839 | 16 | 6 |
| 11 | Arnaud Vincent | Aprilia | 25 | +23.067 | 23 | 5 |
| 12 | Andrea Ballerini | Honda | 25 | +23.134 | 18 | 4 |
| 13 | Stefano Perugini | Italjet | 25 | +43.345 | 17 | 3 |
| 14 | Jorge Lorenzo | Derbi | 25 | +43.973 | 7 | 2 |
| 15 | Masao Azuma | Honda | 25 | +47.189 | 13 | 1 |
| 16 | Jakub Smrž | Honda | 25 | +47.333 | 24 |  |
| 17 | Gianluigi Scalvini | Aprilia | 25 | +52.000 | 22 |  |
| 18 | Héctor Barberá | Aprilia | 25 | +1:11.358 | 27 |  |
| 19 | Mattia Angeloni | Gilera | 25 | +1:11.488 | 29 |  |
| 20 | Alex Baldolini | Aprilia | 25 | +1:21.603 | 32 |  |
| 21 | Jaroslav Huleš | Aprilia | 25 | +1:21.681 | 15 |  |
| 22 | Julian Simon | Honda | 25 | +1:31.723 | 26 |  |
| 23 | Imre Tóth | Honda | 25 | +1:31.794 | 31 |  |
| 24 | Leon Camier | Italjet | 24 | +1 Lap | 33 |  |
| Ret | Chaz Davies | Aprilia | 18 | Retirement | 21 |  |
| Ret | Michel Fabrizio | Gilera | 14 | Accident | 19 |  |
| Ret | Youichi Ui | Derbi | 13 | Accident | 6 |  |
| Ret | Alex de Angelis | Aprilia | 13 | Accident | 12 |  |
| Ret | Ángel Rodríguez | Aprilia | 4 | Retirement | 25 |  |
| Ret | Gino Borsoi | Aprilia | 0 | Accident | 9 |  |
| Ret | Andrea Dovizioso | Honda | 0 | Accident | 14 |  |
| Ret | Alessandro Brannetti | Honda | 0 | Accident | 30 |  |
| Ret | Álvaro Bautista | Aprilia | 0 | Accident | 28 |  |
| DNQ | Javier Machado | Honda |  |  |  |  |
Question:
how many riders scored at least 20 points?
Answer:
2