| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 84 |
36.4%
|
|
| 1 | One minute or less | 64 |
27.7%
|
| 15 | 6 |
2.6%
|
|
| 20 | 2 |
0.9%
|
|
| 30 | 72 |
31.2%
|
|
| 45 | 1 |
0.4%
|
|
| 50 | 2 |
0.9%
|
|
| Sysmiss | 171 |