| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3.9%
|
| 1 | One hour or less | 7 |
13.7%
|
| 2 | 5 |
9.8%
|
|
| 3 | 3 |
5.9%
|
|
| 4 | 3 |
5.9%
|
|
| 5 | 1 |
2%
|
|
| 6 | 4 |
7.8%
|
|
| 7 | 2 |
3.9%
|
|
| 8 | 6 |
11.8%
|
|
| 10 | 1 |
2%
|
|
| 12 | 1 |
2%
|
|
| 16 | 1 |
2%
|
|
| 23 | 1 |
2%
|
|
| 24 | 7 |
13.7%
|
|
| 48 | 2 |
3.9%
|
|
| 72 | 2 |
3.9%
|
|
| 120 | 2 |
3.9%
|
|
| 164 | 1 |
2%
|
|
| Sysmiss | 868 |