| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 103 |
75.2%
|
|
| 1 | One minute or less | 5 |
3.6%
|
| 5 | 3 |
2.2%
|
|
| 10 | 4 |
2.9%
|
|
| 15 | 1 |
0.7%
|
|
| 20 | 3 |
2.2%
|
|
| 30 | 18 |
13.1%
|
|
| Sysmiss | 226 |