| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.9%
|
| 1 | One minute or less | 9 |
17%
|
| 4 | 1 |
1.9%
|
|
| 5 | 5 |
9.4%
|
|
| 6 | 3 |
5.7%
|
|
| 10 | 9 |
17%
|
|
| 12 | 1 |
1.9%
|
|
| 15 | 7 |
13.2%
|
|
| 20 | 3 |
5.7%
|
|
| 30 | 10 |
18.9%
|
|
| 40 | 1 |
1.9%
|
|
| 45 | 1 |
1.9%
|
|
| 59 | 2 |
3.8%
|
|
| Sysmiss | 545 |