Explanation of symbols
| Symbol | Explanation |
|---|---|
| Empty cell | figure not applicable |
| . | figure is unknown, insufficiently reliable or confidential |
| * | provisional figure |
| ** | revised provisional figure |
| – | (between two numbers) inclusive |
| 0 (0.0) | less than half of unit concerned |
| 2016–2017 | 2016 to 2017 inclusive |
| 2016/2017 | average for the years 2016 up to and including 2017 |
| 2016/’17 | crop year, financial year, school year etc., beginning in 2016 and ending in 2017 |
| 2004/’05–2016/’17 | crop year etc. 2004/’05 up to and including 2016/’17 |
| Because of rounding, some totals may not correspond with the sum of the separate cells. Revised figures are not marked as such. | |