| Rank | Area | Yield |
|---|---|---|
| 1 | Scotland | 5.7% |
| 2 | North East | 4.9% |
| 3 | North West | 4.8% |
| 4 | Yorkshire And The Humber | 4.5% |
| 5 | South East | 4.5% |
| 6 | West Midlands | 4.4% |
| 7 | Wales | 4.4% |
| 8 | East | 4.3% |
| 9 | East Midlands | 4.2% |
| 10 | London | 4.1% |
| 11 | South West | 4.0% |
| 12 | Channel Islands | 2.7% |
| 13 | Isle Of Man | 0.0% |
| 14 | Northern Ireland | 0.0% |