| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.4%
|
| 0 | Less than 1 hour | 40 |
27.6%
|
| 1 | 18 |
12.4%
|
|
| 2 | 14 |
9.7%
|
|
| 3 | 12 |
8.3%
|
|
| 4 | 9 |
6.2%
|
|
| 5 | 5 |
3.4%
|
|
| 6 | 6 |
4.1%
|
|
| 7 | 2 |
1.4%
|
|
| 8 | 2 |
1.4%
|
|
| 9 | 1 |
0.7%
|
|
| 10 | 4 |
2.8%
|
|
| 11 | 1 |
0.7%
|
|
| 12 | 7 |
4.8%
|
|
| 18 | 1 |
0.7%
|
|
| 24 | 6 |
4.1%
|
|
| 25 | 1 |
0.7%
|
|
| 30 | 1 |
0.7%
|
|
| 36 | 1 |
0.7%
|
|
| 48 | 4 |
2.8%
|
|
| 60 | 1 |
0.7%
|
|
| 62 | 1 |
0.7%
|
|
| 120 | 1 |
0.7%
|
|
| 168 | 1 |
0.7%
|
|
| 240 | 1 |
0.7%
|
|
| Sysmiss | 212 |