| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
9.4%
|
| 0 | Less than 1 hour | 15 |
14.2%
|
| 1 | 3 |
2.8%
|
|
| 2 | 14 |
13.2%
|
|
| 3 | 8 |
7.5%
|
|
| 4 | 1 |
0.9%
|
|
| 5 | 6 |
5.7%
|
|
| 7 | 1 |
0.9%
|
|
| 8 | 2 |
1.9%
|
|
| 10 | 5 |
4.7%
|
|
| 12 | 3 |
2.8%
|
|
| 14 | 1 |
0.9%
|
|
| 15 | 1 |
0.9%
|
|
| 20 | 3 |
2.8%
|
|
| 22 | 1 |
0.9%
|
|
| 24 | 6 |
5.7%
|
|
| 30 | 2 |
1.9%
|
|
| 39 | 1 |
0.9%
|
|
| 40 | 1 |
0.9%
|
|
| 48 | 2 |
1.9%
|
|
| 50 | 4 |
3.8%
|
|
| 55 | 1 |
0.9%
|
|
| 60 | 3 |
2.8%
|
|
| 70 | 1 |
0.9%
|
|
| 75 | 1 |
0.9%
|
|
| 100 | 2 |
1.9%
|
|
| 120 | 1 |
0.9%
|
|
| 150 | 1 |
0.9%
|
|
| 200 | 4 |
3.8%
|
|
| 240 | 1 |
0.9%
|
|
| 300 | 1 |
0.9%
|
|
| Sysmiss | 486 |