| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 26 |
4%
|
| 0 | Less than 1 hour | 265 |
40.5%
|
| 1 | 101 |
15.4%
|
|
| 2 | 83 |
12.7%
|
|
| 3 | 37 |
5.7%
|
|
| 4 | 26 |
4%
|
|
| 5 | 35 |
5.4%
|
|
| 6 | 6 |
0.9%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 10 |
1.5%
|
|
| 10 | 12 |
1.8%
|
|
| 12 | 8 |
1.2%
|
|
| 15 | 7 |
1.1%
|
|
| 16 | 3 |
0.5%
|
|
| 20 | 5 |
0.8%
|
|
| 24 | 11 |
1.7%
|
|
| 30 | 2 |
0.3%
|
|
| 35 | 1 |
0.2%
|
|
| 36 | 1 |
0.2%
|
|
| 46 | 1 |
0.2%
|
|
| 48 | 3 |
0.5%
|
|
| 60 | 5 |
0.8%
|
|
| 68 | 1 |
0.2%
|
|
| 72 | 3 |
0.5%
|
|
| 90 | 1 |
0.2%
|
|
| Sysmiss | 2043 |