| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.1%
|
| 1 | Less than one hour | 4 |
3.1%
|
| 2 | 16 |
12.3%
|
|
| 3 | 6 |
4.6%
|
|
| 5 | 9 |
6.9%
|
|
| 6 | 2 |
1.5%
|
|
| 7 | 2 |
1.5%
|
|
| 8 | 8 |
6.2%
|
|
| 10 | 2 |
1.5%
|
|
| 12 | 17 |
13.1%
|
|
| 15 | 1 |
0.8%
|
|
| 20 | 1 |
0.8%
|
|
| 24 | 36 |
27.7%
|
|
| 27 | 1 |
0.8%
|
|
| 30 | 3 |
2.3%
|
|
| 36 | 1 |
0.8%
|
|
| 42 | 2 |
1.5%
|
|
| 48 | 6 |
4.6%
|
|
| 62 | 1 |
0.8%
|
|
| 64 | 1 |
0.8%
|
|
| 72 | 5 |
3.8%
|
|
| 96 | 1 |
0.8%
|
|
| 210 | 1 |
0.8%
|
|
| Sysmiss | 871 |