| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
2.2%
|
| 0 | Less than 1 hour | 50 |
13.9%
|
| 1 | 16 |
4.4%
|
|
| 2 | 63 |
17.5%
|
|
| 3 | 59 |
16.4%
|
|
| 4 | 39 |
10.8%
|
|
| 5 | 71 |
19.7%
|
|
| 6 | 23 |
6.4%
|
|
| 7 | 2 |
0.6%
|
|
| 8 | 4 |
1.1%
|
|
| 10 | 6 |
1.7%
|
|
| 12 | 1 |
0.3%
|
|
| 15 | 1 |
0.3%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 2 |
0.6%
|
|
| 24 | 4 |
1.1%
|
|
| 25 | 1 |
0.3%
|
|
| 44 | 1 |
0.3%
|
|
| 48 | 5 |
1.4%
|
|
| 60 | 1 |
0.3%
|
|
| 62 | 1 |
0.3%
|
|
| 72 | 1 |
0.3%
|
|
| Sysmiss | 255 |