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 | Time/Retired | Points |
| --- | --- | --- | --- | --- |
| 1 | Tohru Ukawa | Honda | 49:50.449 | 25 |
| 2 | Franco Battaini | Aprilia | +5.125 | 20 |
| 3 | Loris Capirossi | Honda | +10.224 | 16 |
| 4 | Shinya Nakano | Yamaha | +14.848 | 13 |
| 5 | Stefano Perugini | Honda | +34.042 | 11 |
| 6 | Sebastian Porto | Yamaha | +37.495 | 10 |
| 7 | Jason Vincent | Honda | +44.911 | 9 |
| 8 | Valentino Rossi | Aprilia | +1:01.110 | 8 |
| 9 | Anthony West | TSR-Honda | +1:10.352 | 7 |
| 10 | Alex Hofmann | TSR-Honda | +1:18.683 | 6 |
| 11 | Luca Boscoscuro | TSR-Honda | +1:20.847 | 5 |
| 12 | Lucas Oliver Bulto | Yamaha | +1:23.052 | 4 |
| 13 | Roberto Rolfo | Aprilia | +1:24.329 | 3 |
| 14 | Masaki Tokudome | TSR-Honda | +1:26.837 | 2 |
| 15 | Fonsi Nieto | Yamaha | +1:45.669 | 1 |
| 16 | David Garcia | Yamaha | +1:48.926 |  |
| 17 | Scott Smart | Aprilia | +1:49.730 |  |
| 18 | Alex Debón | Honda | +1 Lap |  |
| 19 | Jarno Janssen | TSR-Honda | +1 Lap |  |
| Ret | Alvaro Molina | Honda | Retirement |  |
| Ret | Julien Allemand | TSR-Honda | Retirement |  |
| Ret | Ismael Bonilla | Honda | Retirement |  |
| Ret | Daniel Ribalta | Aprilia | Retirement |  |
| Ret | Maurice Bolwerk | Honda | Retirement |  |
| Ret | Tomomi Manako | Yamaha | Retirement |  |
| Ret | Johann Stigefelt | Yamaha | Retirement |  |
| Ret | Olivier Jacque | Yamaha | Retirement |  |
| Ret | Jeremy McWilliams | Aprilia | Retirement |  |
| Ret | David Ortega | TSR-Honda | Retirement |  |
| Ret | Alfredo Rios | Aprilia | Retirement |  |
| Ret | Ralf Waldmann | Aprilia | Retirement |  |
Question:
how many riders scored no points at all?
Answer:
16