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 | Area | Authority | Decile | Roll |
| --- | --- | --- | --- | --- | --- |
| Ahuroa School | 1–8 | Ahuroa | State | 7.0 | 80.0 |
| Coatesville School | 1–6 | Coatesville | State | 10.0 | 250.0 |
| Dairy Flat School | 1–8 | Dairy Flat | State | 10.0 | 251.0 |
| Hare Krishna School | 1–8 | Kumeu | State integrated | 5.0 | 92.0 |
| Helensville Primary School | 1–8 | Helensville | State | 5.0 | 422.0 |
| Huapai District School | 1–8 | Huapai | State | 9.0 | 458.0 |
| Kaipara Flats School | 1–6 | Kaipara Flats | State | 9.0 | 85.0 |
| Kaukapakapa School | 1–8 | Kaukapakapa | State | 8.0 | 252.0 |
| Leigh School | 1–6 | Leigh | State | 5.0 | 54.0 |
| Mahurangi Christian School | 1–8 | Snells Beach | State integrated | 8.0 | 37.0 |
| Matakana School | 1–6 | Matakana | State | 9.0 | 325.0 |
| Pakiri School | 1–8 | Pakiri | State | 6.0 | 19.0 |
| Parakai School | 1–8 | Parakai | State | 3.0 | 164.0 |
| Riverhead School | 1–8 | Riverhead | State | 8.0 | 290.0 |
| Snells Beach Primary | 1–6 | Snells Beach | State | 8.0 | 228.0 |
| Tapora School | 1–8 | Tapora | State | 6.0 | 33.0 |
| Tauhoa School | 1–8 | Tauhoa | State | 7.0 | 44.0 |
| Taupaki School | 1–8 | Taupaki | State | 10.0 | 264.0 |
| Tomarata School | 1–8 | Tomarata | State | 7.0 | 144.0 |
| Waimauku School | 1–8 | Waimauku | State | 10.0 | 641.0 |
| Wainui School | 1–8 | Wainui | State | 10.0 | 209.0 |
| Waioneke School | 1–8 | Waioneke | State | 7.0 | 87.0 |
| Waitoki School | 1–8 | Waitoki | State | 10.0 | 87.0 |
| Warkworth Primary School | 1–6 | Warkworth | State | 8.0 | 536.0 |
| Wellsford School | 1–8 | Wellsford | State | 4.0 | 328.0 |
| Woodhill School | 1–8 | Woodhill | State | 7.0 | 112.0 |
Question:
Name the highest Decile for roll more than 325 and area of warkworth
Answer:
8.0