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:
| Rank by average | Place | Couple | Total points | Number of dances | Average |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 1.0 | Hayley & Daniel | 303.5 | 12.0 | 25.3 |
| 2.0 | 2.0 | Gary & Maria | 254.5 | 12.0 | 21.2 |
| 3.0 | 4.0 | Daniella & Matthew | 210.5 | 10.0 | 21.2 |
| 4.0 | 3.0 | Keiron & Brianne | 237.5 | 12.0 | 19.8 |
| 5.0 | 5.0 | Danny & Frankie | 173.0 | 9.0 | 19.2 |
| 6.0 | 6.0 | Mikey & Melanie | 139.5 | 8.0 | 17.4 |
| 7.0 | 14.0 | sinnita & Andrei | 15.0 | 1.0 | 15.0 |
| 8.0 | 10.0 | Heather & Matt | 59.0 | 4.0 | 14.8 |
| 8.0 | 8.0 | Sharron & Pavel | 89.0 | 6.0 | 14.8 |
| 10.0 | 7.0 | Emily & Fred | 99.0 | 7.0 | 14.1 |
| 11.0 | 12.0 | Jeremy & Suzie | 24.5 | 2.0 | 12.3 |
| 11.0 | 11.0 | Tana and Stuart | 37.0 | 3.0 | 12.3 |
| 13.0 | 9.0 | Hilary and Alexandra | 54.0 | 5.0 | 10.8 |
Question:
How many ranks by average for the couple Tana and Stuart?
Answer:
1.0