| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 28 |
31.1%
|
|
| 1 | One minute or less | 44 |
48.9%
|
| 10 | 2 |
2.2%
|
|
| 15 | 1 |
1.1%
|
|
| 30 | 12 |
13.3%
|
|
| 45 | 2 |
2.2%
|
|
| 50 | 1 |
1.1%
|
|
| Sysmiss | 60 |