| Symbol |
Explanation |
| . |
= data not available |
| * |
= provisional figure |
| - |
= nil |
| - |
= (between two figures) inclusive |
| 0 (0.0) |
= less than half of unit employed |
| a blank |
= category not available |
| 2001-2002 |
= 2001 to 2002 inclusive |
| 2001/2002 |
= average for the years 2001 up to and including 2002 |
| 2001/'02 |
= crop year, financial year, school year etc., beginning in 2001 and terminating in 2002 |
| 1991/'92-2001/'02 |
= book year etc., 1991/'92 up to and including 2001/'02 |
| |
Detailed items in tables do not necessarily add to totals because of rounding. Where figures in a table are not taken from a publication, the source details below the table are left blank. |
