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:
| Club | Played | Won | Drawn | Lost | Points for | Points against | Tries for | Tries against | Try bonus | Losing bonus | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Won | Drawn | Lost | Points for | Points against | Tries for | Tries against | Try bonus | Losing bonus | Points |
| Porth Harlequins RFC | 20 | 17 | 0 | 3 | 642 | 173 | 100 | 19 | 12 | 2 | 82 |
| St. Joseph's RFC | 20 | 17 | 0 | 3 | 503 | 179 | 69 | 17 | 9 | 3 | 80 |
| Pontyclun RFC | 20 | 14 | 1 | 5 | 468 | 218 | 66 | 24 | 7 | 2 | 67 |
| Deri RFC | 20 | 14 | 0 | 6 | 476 | 285 | 65 | 33 | 7 | 3 | 66 |
| St. Albans RFC | 20 | 11 | 0 | 9 | 402 | 423 | 58 | 61 | 7 | 1 | 52 |
| Cowbridge RFC | 20 | 8 | 0 | 12 | 329 | 379 | 37 | 54 | 3 | 7 | 42 |
| Old Penarthians RFC | 20 | 9 | 0 | 11 | 231 | 369 | 29 | 53 | 2 | 3 | 41 |
| Penygraig RFC | 20 | 6 | 1 | 13 | 260 | 436 | 30 | 63 | 2 | 5 | 33 |
| Ogmore Vale RFC | 20 | 6 | 0 | 14 | 208 | 475 | 27 | 71 | 2 | 3 | 29 |
| Canton RFC | 20 | 4 | 0 | 16 | 248 | 499 | 34 | 67 | 3 | 6 | 25 |
| Dinas Powys RFC | 20 | 3 | 0 | 17 | 161 | 492 | 20 | 73 | 1 | 1 | 14 |
Question:
What is the try bonus when the tries against are 17? 
Answer:
9.0