| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 7 |
3.5%
|
| 2 | 15 |
7.5%
|
|
| 3 | 54 |
27.1%
|
|
| 4 | 17 |
8.5%
|
|
| 5 | 18 |
9%
|
|
| 6 | 6 |
3%
|
|
| 7 | 3 |
1.5%
|
|
| 8 | 15 |
7.5%
|
|
| 9 | 1 |
0.5%
|
|
| 10 | 4 |
2%
|
|
| 11 | 1 |
0.5%
|
|
| 12 | 5 |
2.5%
|
|
| 14 | 1 |
0.5%
|
|
| 15 | 8 |
4%
|
|
| 16 | 3 |
1.5%
|
|
| 20 | 4 |
2%
|
|
| 22 | 1 |
0.5%
|
|
| 24 | 7 |
3.5%
|
|
| 25 | 3 |
1.5%
|
|
| 26 | 1 |
0.5%
|
|
| 28 | 1 |
0.5%
|
|
| 30 | 6 |
3%
|
|
| 32 | 2 |
1%
|
|
| 35 | 1 |
0.5%
|
|
| 36 | 4 |
2%
|
|
| 40 | 1 |
0.5%
|
|
| 42 | 1 |
0.5%
|
|
| 45 | 1 |
0.5%
|
|
| 48 | 1 |
0.5%
|
|
| 50 | 3 |
1.5%
|
|
| 52 | 1 |
0.5%
|
|
| 120 | 3 |
1.5%
|
|
| Sysmiss | 161 |