| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
3.6%
|
| 0 | Less than 1 hour | 22 |
11.5%
|
| 1 | 4 |
2.1%
|
|
| 2 | 24 |
12.5%
|
|
| 3 | 13 |
6.8%
|
|
| 4 | 13 |
6.8%
|
|
| 5 | 23 |
12%
|
|
| 6 | 5 |
2.6%
|
|
| 7 | 2 |
1%
|
|
| 8 | 11 |
5.7%
|
|
| 9 | 4 |
2.1%
|
|
| 10 | 9 |
4.7%
|
|
| 12 | 4 |
2.1%
|
|
| 14 | 2 |
1%
|
|
| 15 | 12 |
6.3%
|
|
| 20 | 8 |
4.2%
|
|
| 24 | 1 |
0.5%
|
|
| 25 | 2 |
1%
|
|
| 30 | 14 |
7.3%
|
|
| 35 | 1 |
0.5%
|
|
| 36 | 2 |
1%
|
|
| 48 | 1 |
0.5%
|
|
| 49 | 1 |
0.5%
|
|
| 50 | 1 |
0.5%
|
|
| 60 | 2 |
1%
|
|
| 90 | 1 |
0.5%
|
|
| 96 | 1 |
0.5%
|
|
| 240 | 1 |
0.5%
|
|
| 250 | 1 |
0.5%
|
|
| Sysmiss | 806 |