| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 58 |
32.6%
|
| 1 | One hour or less | 9 |
5.1%
|
| 2 | 16 |
9%
|
|
| 3 | 11 |
6.2%
|
|
| 4 | 7 |
3.9%
|
|
| 5 | 1 |
0.6%
|
|
| 7 | 1 |
0.6%
|
|
| 8 | 8 |
4.5%
|
|
| 10 | 8 |
4.5%
|
|
| 12 | 4 |
2.2%
|
|
| 16 | 15 |
8.4%
|
|
| 20 | 8 |
4.5%
|
|
| 22 | 1 |
0.6%
|
|
| 24 | 4 |
2.2%
|
|
| 30 | 2 |
1.1%
|
|
| 32 | 1 |
0.6%
|
|
| 40 | 6 |
3.4%
|
|
| 50 | 1 |
0.6%
|
|
| 60 | 5 |
2.8%
|
|
| 70 | 1 |
0.6%
|
|
| 80 | 1 |
0.6%
|
|
| 90 | 1 |
0.6%
|
|
| 96 | 1 |
0.6%
|
|
| 100 | 5 |
2.8%
|
|
| 110 | 1 |
0.6%
|
|
| 120 | 1 |
0.6%
|
|
| 168 | 1 |
0.6%
|
|
| Sysmiss | 173 |