| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.7%
|
| 0 | Less than 1 hour | 17 |
23.3%
|
| 1 | 17 |
23.3%
|
|
| 2 | 15 |
20.5%
|
|
| 3 | 4 |
5.5%
|
|
| 4 | 1 |
1.4%
|
|
| 5 | 5 |
6.8%
|
|
| 6 | 1 |
1.4%
|
|
| 8 | 1 |
1.4%
|
|
| 9 | 1 |
1.4%
|
|
| 10 | 2 |
2.7%
|
|
| 24 | 2 |
2.7%
|
|
| 40 | 1 |
1.4%
|
|
| 48 | 1 |
1.4%
|
|
| 50 | 1 |
1.4%
|
|
| 60 | 1 |
1.4%
|
|
| 200 | 1 |
1.4%
|
|
| Sysmiss | 281 |