| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 13 |
65%
|
|
| 1 | One minute or less | 0 |
0%
|
| 30 | 5 |
25%
|
|
| 50 | 1 |
5%
|
|
| 55 | 1 |
5%
|
|
| Sysmiss | 341 |