| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.6%
|
| 0 | Less than one day | 9 |
5.8%
|
| 1 | 10 |
6.4%
|
|
| 2 | 32 |
20.5%
|
|
| 3 | 17 |
10.9%
|
|
| 4 | 13 |
8.3%
|
|
| 5 | 10 |
6.4%
|
|
| 6 | 4 |
2.6%
|
|
| 7 | 13 |
8.3%
|
|
| 8 | 2 |
1.3%
|
|
| 9 | 3 |
1.9%
|
|
| 10 | 6 |
3.8%
|
|
| 12 | 4 |
2.6%
|
|
| 13 | 1 |
0.6%
|
|
| 14 | 3 |
1.9%
|
|
| 15 | 6 |
3.8%
|
|
| 18 | 1 |
0.6%
|
|
| 20 | 9 |
5.8%
|
|
| 22 | 1 |
0.6%
|
|
| 28 | 1 |
0.6%
|
|
| 30 | 5 |
3.2%
|
|
| 40 | 2 |
1.3%
|
|
| 50 | 1 |
0.6%
|
|
| 63 | 1 |
0.6%
|
|
| 80 | 1 |
0.6%
|
|
| Sysmiss | 442 |