| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2.5%
|
| 0 | 34 |
21.4%
|
|
| 1 | One minute or less | 23 |
14.5%
|
| 5 | 1 |
0.6%
|
|
| 10 | 4 |
2.5%
|
|
| 15 | 22 |
13.8%
|
|
| 20 | 10 |
6.3%
|
|
| 25 | 4 |
2.5%
|
|
| 30 | 30 |
18.9%
|
|
| 35 | 3 |
1.9%
|
|
| 40 | 6 |
3.8%
|
|
| 45 | 15 |
9.4%
|
|
| 50 | 3 |
1.9%
|
|
| Sysmiss | 56 |