| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.2%
|
| 0 | Less than 1 hour | 167 |
50.2%
|
| 1 | 43 |
12.9%
|
|
| 2 | 30 |
9%
|
|
| 3 | 12 |
3.6%
|
|
| 4 | 12 |
3.6%
|
|
| 5 | 12 |
3.6%
|
|
| 6 | 9 |
2.7%
|
|
| 7 | 1 |
0.3%
|
|
| 8 | 8 |
2.4%
|
|
| 10 | 11 |
3.3%
|
|
| 12 | 5 |
1.5%
|
|
| 15 | 2 |
0.6%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 7 |
2.1%
|
|
| 24 | 1 |
0.3%
|
|
| 30 | 2 |
0.6%
|
|
| 40 | 1 |
0.3%
|
|
| 45 | 1 |
0.3%
|
|
| 50 | 1 |
0.3%
|
|
| 60 | 1 |
0.3%
|
|
| 72 | 1 |
0.3%
|
|
| 120 | 1 |
0.3%
|
|
| Sysmiss | 517 |