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 | Points difference | Tries For | Tries Against | Try Bonus | Losing Bonus | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Won | Drawn | Lost | Points for | Points against | Points difference | Tries For | Tries Against | Try Bonus | Losing Bonus | Points |
| Wattstown RFC | 16 | 16 | 0 | 0 | 361 | 117 | +244 | 39 | 14 | 5 | 0 | 69 |
| Bryncethin RFC | 16 | 12 | 0 | 4 | 306 | 184 | +122 | 41 | 26 | 6 | 2 | 56 |
| CRC Caerdydd RFC | 16 | 11 | 0 | 5 | 280 | 197 | +83 | 39 | 23 | 4 | 1 | 49 |
| Cambrian Welfare RFC | 16 | 7 | 1 | 8 | 336 | 209 | +127 | 49 | 20 | 5 | 6 | 41 |
| Glyncoch RFC | 16 | 6 | 0 | 10 | 206 | 248 | -42 | 25 | 31 | 1 | 6 | 31 |
| Llanrumney RFC | 16 | 5 | 1 | 10 | 277 | 304 | -27 | 36 | 38 | 3 | 3 | 28 |
| Ynysowen RFC | 16 | 5 | 0 | 11 | 240 | 339 | -99 | 28 | 49 | 0 | 3 | 23 |
| Caerau Ely RFC | 16 | 4 | 0 | 12 | 163 | 273 | -110 | 21 | 33 | 2 | 4 | 22 |
| Llandrindod Wells RFC | 16 | 5 | 0 | 11 | 155 | 453 | -298 | 18 | 62 | 0 | 1 | 21 |
Question:
How many teams have 21 tries for?
Answer:
1.0