| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2.8%
|
| 0 | Less than 1 hour | 30 |
20.8%
|
| 1 | 25 |
17.4%
|
|
| 2 | 23 |
16%
|
|
| 3 | 14 |
9.7%
|
|
| 4 | 14 |
9.7%
|
|
| 5 | 3 |
2.1%
|
|
| 6 | 4 |
2.8%
|
|
| 8 | 7 |
4.9%
|
|
| 10 | 1 |
0.7%
|
|
| 12 | 3 |
2.1%
|
|
| 17 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| 24 | 6 |
4.2%
|
|
| 36 | 1 |
0.7%
|
|
| 48 | 2 |
1.4%
|
|
| 72 | 4 |
2.8%
|
|
| 120 | 1 |
0.7%
|
|
| Sysmiss | 219 |