| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 36 |
11.9%
|
| 0 | Less than 1 hour | 11 |
3.6%
|
| 1 | 169 |
56%
|
|
| 2 | 27 |
8.9%
|
|
| 3 | 11 |
3.6%
|
|
| 4 | 4 |
1.3%
|
|
| 5 | 4 |
1.3%
|
|
| 6 | 1 |
0.3%
|
|
| 7 | 2 |
0.7%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 4 |
1.3%
|
|
| 11 | 1 |
0.3%
|
|
| 12 | 5 |
1.7%
|
|
| 24 | 10 |
3.3%
|
|
| 30 | 7 |
2.3%
|
|
| 40 | 1 |
0.3%
|
|
| 48 | 3 |
1%
|
|
| 120 | 1 |
0.3%
|
|
| 136 | 1 |
0.3%
|
|
| 168 | 1 |
0.3%
|
|
| 240 | 1 |
0.3%
|
|
| 360 | 1 |
0.3%
|
|
| Sysmiss | 2653 |