| Value |
Category |
| -9 |
Don't know (spontaneous) |
| 1 |
One hour or less |
| 2 |
|
| 3 |
|
| 4 |
|
| 6 |
|
| 8 |
|
| 12 |
|
| 24 |
|
| 25 |
|
| 48 |
|
| 60 |
|
| 360 |
|
| 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.
