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:
| Name | Years | Gender | Area | Authority | Decile | Roll |
| --- | --- | --- | --- | --- | --- | --- |
| Alexandra School | 1–8 | Coed | Alexandra | State | 8.0 | 194.0 |
| Clyde School | 1–8 | Coed | Clyde | State | 9.0 | 127.0 |
| Cromwell College | 7–15 | Coed | Cromwell | State | 8.0 | 390.0 |
| Cromwell Primary School | 1–6 | Coed | Cromwell | State | 8.0 | 225.0 |
| Dunstan High School | 9–15 | Coed | Alexandra | State | 9.0 | 513.0 |
| Goldfields School | 1–6 | Coed | Cromwell | State | 7.0 | 225.0 |
| Maniototo Area School | 1–15 | Coed | Ranfurly | State | 7.0 | 170.0 |
| Millers Flat School | 1–8 | Coed | Millers Flat | State | 7.0 | 32.0 |
| Omakau School | 1–8 | Coed | Omakau | State | 8.0 | 34.0 |
| Poolburn School | 1–8 | Coed | Oturehua | State | 10.0 | 35.0 |
| Roxburgh Area School | 1–15 | Coed | Roxburgh | State | 4.0 | 166.0 |
| St Gerard's School | 1–8 | Coed | Alexandra | State integrated | 9.0 | 116.0 |
| St John's School | 1–8 | Coed | Ranfurly | State integrated | 7.0 | 55.0 |
| Tarras School | 1–8 | Coed | Tarras | State | 10.0 | 16.0 |
| The Terrace School | 1–8 | Coed | Alexandra | State | 8.0 | 388.0 |
Question:
What is the highest decile of Tarras school, which had a state authority?
Answer:
10.0