| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
15.5%
|
| 1 | One hour or less | 1 |
0.6%
|
| 2 | 1 |
0.6%
|
|
| 3 | 4 |
2.2%
|
|
| 4 | 9 |
5%
|
|
| 5 | 6 |
3.3%
|
|
| 6 | 4 |
2.2%
|
|
| 7 | 4 |
2.2%
|
|
| 8 | 10 |
5.5%
|
|
| 10 | 6 |
3.3%
|
|
| 12 | 1 |
0.6%
|
|
| 15 | 2 |
1.1%
|
|
| 16 | 5 |
2.8%
|
|
| 20 | 3 |
1.7%
|
|
| 24 | 16 |
8.8%
|
|
| 25 | 1 |
0.6%
|
|
| 28 | 1 |
0.6%
|
|
| 30 | 6 |
3.3%
|
|
| 32 | 11 |
6.1%
|
|
| 34 | 1 |
0.6%
|
|
| 35 | 1 |
0.6%
|
|
| 36 | 3 |
1.7%
|
|
| 40 | 19 |
10.5%
|
|
| 45 | 1 |
0.6%
|
|
| 48 | 3 |
1.7%
|
|
| 50 | 4 |
2.2%
|
|
| 56 | 2 |
1.1%
|
|
| 60 | 3 |
1.7%
|
|
| 64 | 1 |
0.6%
|
|
| 78 | 1 |
0.6%
|
|
| 80 | 14 |
7.7%
|
|
| 84 | 2 |
1.1%
|
|
| 88 | 1 |
0.6%
|
|
| 96 | 1 |
0.6%
|
|
| 100 | 1 |
0.6%
|
|
| 120 | 1 |
0.6%
|
|
| 125 | 1 |
0.6%
|
|
| 180 | 1 |
0.6%
|
|
| 200 | 1 |
0.6%
|
|
| Sysmiss | 173 |