| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
15.6%
|
| 1 | One hour or less | 11 |
5.7%
|
| 2 | 7 |
3.6%
|
|
| 3 | 13 |
6.8%
|
|
| 4 | 9 |
4.7%
|
|
| 5 | 19 |
9.9%
|
|
| 6 | 10 |
5.2%
|
|
| 8 | 17 |
8.9%
|
|
| 9 | 2 |
1%
|
|
| 10 | 8 |
4.2%
|
|
| 12 | 6 |
3.1%
|
|
| 14 | 1 |
0.5%
|
|
| 15 | 3 |
1.6%
|
|
| 16 | 5 |
2.6%
|
|
| 20 | 5 |
2.6%
|
|
| 24 | 9 |
4.7%
|
|
| 25 | 3 |
1.6%
|
|
| 30 | 1 |
0.5%
|
|
| 36 | 3 |
1.6%
|
|
| 40 | 4 |
2.1%
|
|
| 45 | 2 |
1%
|
|
| 48 | 5 |
2.6%
|
|
| 50 | 3 |
1.6%
|
|
| 60 | 3 |
1.6%
|
|
| 72 | 2 |
1%
|
|
| 75 | 1 |
0.5%
|
|
| 80 | 2 |
1%
|
|
| 96 | 2 |
1%
|
|
| 120 | 1 |
0.5%
|
|
| 160 | 1 |
0.5%
|
|
| 180 | 2 |
1%
|
|
| 350 | 1 |
0.5%
|
|
| 416 | 1 |
0.5%
|
|
| Sysmiss | 161 |