| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
5.4%
|
| 0 | 16 |
43.2%
|
|
| 1 | One minute or less | 7 |
18.9%
|
| 2 | 1 |
2.7%
|
|
| 5 | 1 |
2.7%
|
|
| 10 | 1 |
2.7%
|
|
| 15 | 2 |
5.4%
|
|
| 30 | 5 |
13.5%
|
|
| 59 | 2 |
5.4%
|
|
| Sysmiss | 314 |