| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 76 |
79.2%
|
| 1 | One hour or less | 3 |
3.1%
|
| 2 | 1 |
1%
|
|
| 3 | 4 |
4.2%
|
|
| 4 | 2 |
2.1%
|
|
| 5 | 3 |
3.1%
|
|
| 16 | 1 |
1%
|
|
| 24 | 1 |
1%
|
|
| 30 | 1 |
1%
|
|
| 42 | 1 |
1%
|
|
| 78 | 1 |
1%
|
|
| 144 | 1 |
1%
|
|
| 168 | 1 |
1%
|
|
| Sysmiss | 415 |