| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 17 |
19.5%
|
|
| 1 | One minute or less | 25 |
28.7%
|
| 3 | 1 |
1.1%
|
|
| 10 | 4 |
4.6%
|
|
| 15 | 3 |
3.4%
|
|
| 20 | 15 |
17.2%
|
|
| 25 | 3 |
3.4%
|
|
| 30 | 11 |
12.6%
|
|
| 40 | 5 |
5.7%
|
|
| 50 | 3 |
3.4%
|
|
| Sysmiss | 277 |