| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 6 |
24%
|
|
| 1 | One minute or less | 3 |
12%
|
| 2 | 1 |
4%
|
|
| 3 | 1 |
4%
|
|
| 10 | 2 |
8%
|
|
| 15 | 1 |
4%
|
|
| 30 | 7 |
28%
|
|
| 45 | 1 |
4%
|
|
| 50 | 2 |
8%
|
|
| 59 | 1 |
4%
|
|
| Sysmiss | 221 |