| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
3.1%
|
| 1 | One minute or less | 16 |
50%
|
| 10 | 2 |
6.3%
|
|
| 15 | 1 |
3.1%
|
|
| 30 | 7 |
21.9%
|
|
| 40 | 3 |
9.4%
|
|
| 55 | 1 |
3.1%
|
|
| 59 | 1 |
3.1%
|
|
| Sysmiss | 88 |