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 | Loris Capirossi | Honda | 43:06.089 | 25 |
| 2 | Doriano Romboni | Honda | +0.689 | 20 |
| 3 | Max Biaggi | Aprilia | +1.181 | 16 |
| 4 | Ralf Waldmann | Honda | +5.123 | 13 |
| 5 | Jean-Michel Bayle | Aprilia | +5.528 | 11 |
| 6 | Nobuatsu Aoki | Honda | +5.821 | 10 |
| 7 | Jean Philippe Ruggia | Aprilia | +9.018 | 9 |
| 8 | Tetsuya Harada | Yamaha | +24.059 | 8 |
| 9 | Tadayuki Okada | Honda | +29.043 | 7 |
| 10 | Wilco Zeelenberg | Honda | +36.273 | 6 |
| 11 | Toshihiko Honma | Yamaha | +41.787 | 5 |
| 12 | Adrien Bosshard | Honda | +52.489 | 4 |
| 13 | Carlos Checa | Honda | +57.206 | 3 |
| 14 | Eskil Suter | Aprilia | +1:01.503 | 2 |
| 15 | Luis Maurel | Honda | +1:03.353 | 1 |
| 16 | Patrick vd Goorbergh | Aprilia | +1:04.277 |  |
| 17 | Adolf Stadler | Honda | +1:16.427 |  |
| 18 | Juan Borja | Honda | +1:19.607 |  |
| 19 | Chrisrian Boudinot | Aprilia | +1:20.163 |  |
| 20 | Bernd Kassner | Aprilia | +1:20.761 |  |
| 21 | Andreas Preining | Aprilia | +1:26.864 |  |
| 22 | Noel Ferro | Honda | +1:27.009 |  |
| 23 | Sebastien Scarnato | Honda | +1:36.321 |  |
| 24 | Krisse Kaas | Yamaha | +1 Lap |  |
| 25 | Donnie Hough | Honda | +1 Lap |  |
| Ret | Rodney Fee | Honda | Retirement |  |
| Ret | Jurgen vd Goorbergh | Aprilia | Retirement |  |
| Ret | Luis D'Antin | Honda | Retirement |  |
| Ret | Manuel Hernandez | Aprilia | Retirement |  |
| Ret | Frederic Protat | Honda | Retirement |  |
| Ret | Giuseppe Fiorillo | Honda | Retirement |  |
| Ret | José Luis Cardoso | Aprilia | Retirement |  |
| Ret | Enrique de Juan | Aprilia | Retirement |  |
| Ret | Alessandro Gramigni | Aprilia | Retirement |  |
Question:
how many number of riders rode motorcycles by honda?
Answer:
18