| Value |
Category |
| -9 |
Don't know (spontaneous) |
| 1 |
One hour or less |
| 2 |
|
| 3 |
|
| 6 |
|
| 13 |
|
| 19 |
|
| 22 |
|
| 72 |
|
| 120 |
|
| 236 |
|
| 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.
