| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 13 |
40.6%
|
|
| 1 | One minute or less | 1 |
3.1%
|
| 3 | 1 |
3.1%
|
|
| 10 | 3 |
9.4%
|
|
| 15 | 3 |
9.4%
|
|
| 20 | 1 |
3.1%
|
|
| 30 | 4 |
12.5%
|
|
| 40 | 1 |
3.1%
|
|
| 50 | 4 |
12.5%
|
|
| 55 | 1 |
3.1%
|
|
| Sysmiss | 370 |