| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
5%
|
| 0 | Less than 1 hour | 54 |
38.3%
|
| 1 | 6 |
4.3%
|
|
| 2 | 9 |
6.4%
|
|
| 3 | 9 |
6.4%
|
|
| 4 | 8 |
5.7%
|
|
| 5 | 6 |
4.3%
|
|
| 6 | 2 |
1.4%
|
|
| 8 | 8 |
5.7%
|
|
| 10 | 3 |
2.1%
|
|
| 12 | 5 |
3.5%
|
|
| 15 | 1 |
0.7%
|
|
| 16 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| 24 | 8 |
5.7%
|
|
| 43 | 1 |
0.7%
|
|
| 45 | 1 |
0.7%
|
|
| 48 | 7 |
5%
|
|
| 72 | 1 |
0.7%
|
|
| 104 | 1 |
0.7%
|
|
| 120 | 1 |
0.7%
|
|
| 168 | 1 |
0.7%
|
|
| Sysmiss | 838 |