| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 29 |
18%
|
| 1 | One hour or less | 0 |
0%
|
| 10 | 8 |
5%
|
|
| 11 | 3 |
1.9%
|
|
| 12 | 5 |
3.1%
|
|
| 14 | 1 |
0.6%
|
|
| 15 | 4 |
2.5%
|
|
| 18 | 2 |
1.2%
|
|
| 22 | 1 |
0.6%
|
|
| 24 | 5 |
3.1%
|
|
| 25 | 1 |
0.6%
|
|
| 30 | 27 |
16.8%
|
|
| 31 | 3 |
1.9%
|
|
| 32 | 3 |
1.9%
|
|
| 33 | 2 |
1.2%
|
|
| 35 | 8 |
5%
|
|
| 36 | 7 |
4.3%
|
|
| 37 | 1 |
0.6%
|
|
| 38 | 5 |
3.1%
|
|
| 40 | 3 |
1.9%
|
|
| 48 | 4 |
2.5%
|
|
| 50 | 8 |
5%
|
|
| 60 | 4 |
2.5%
|
|
| 70 | 1 |
0.6%
|
|
| 72 | 1 |
0.6%
|
|
| 75 | 1 |
0.6%
|
|
| 80 | 1 |
0.6%
|
|
| 96 | 1 |
0.6%
|
|
| 98 | 1 |
0.6%
|
|
| 100 | 4 |
2.5%
|
|
| 115 | 1 |
0.6%
|
|
| 120 | 2 |
1.2%
|
|
| 140 | 1 |
0.6%
|
|
| 144 | 1 |
0.6%
|
|
| 148 | 1 |
0.6%
|
|
| 150 | 1 |
0.6%
|
|
| 160 | 1 |
0.6%
|
|
| 180 | 1 |
0.6%
|
|
| 200 | 1 |
0.6%
|
|
| 240 | 1 |
0.6%
|
|
| 288 | 1 |
0.6%
|
|
| 300 | 1 |
0.6%
|
|
| 360 | 2 |
1.2%
|
|
| 400 | 1 |
0.6%
|
|
| 720 | 1 |
0.6%
|
|
| Sysmiss | 199 |