| Value |
Category |
| 1 |
01. Mins |
| 2 |
02. Hours |
| 3 |
03. Days |
| 4 |
04. Weeks |
| 5 |
05. Mnths |
| 6 |
06. Years |
| 95 |
95. Topcode |
| 96 |
96. N/A |
| 97 |
97. Refuse |
| 98 |
98. DK |
| 99 |
99. Miss |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.