| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 18 |
11%
|
| 0 | Less than 1 hour | 27 |
16.6%
|
| 1 | 4 |
2.5%
|
|
| 2 | 23 |
14.1%
|
|
| 3 | 11 |
6.7%
|
|
| 4 | 9 |
5.5%
|
|
| 5 | 16 |
9.8%
|
|
| 6 | 15 |
9.2%
|
|
| 7 | 4 |
2.5%
|
|
| 8 | 4 |
2.5%
|
|
| 10 | 2 |
1.2%
|
|
| 12 | 2 |
1.2%
|
|
| 13 | 1 |
0.6%
|
|
| 24 | 10 |
6.1%
|
|
| 25 | 1 |
0.6%
|
|
| 40 | 3 |
1.8%
|
|
| 48 | 6 |
3.7%
|
|
| 60 | 2 |
1.2%
|
|
| 72 | 1 |
0.6%
|
|
| 168 | 2 |
1.2%
|
|
| 200 | 1 |
0.6%
|
|
| 210 | 1 |
0.6%
|
|
| Sysmiss | 144 |