| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 48 |
41.4%
|
| 1 | One hour or less | 6 |
5.2%
|
| 2 | 2 |
1.7%
|
|
| 12 | 3 |
2.6%
|
|
| 16 | 1 |
0.9%
|
|
| 20 | 4 |
3.4%
|
|
| 24 | 2 |
1.7%
|
|
| 30 | 2 |
1.7%
|
|
| 36 | 2 |
1.7%
|
|
| 45 | 1 |
0.9%
|
|
| 48 | 2 |
1.7%
|
|
| 50 | 6 |
5.2%
|
|
| 60 | 4 |
3.4%
|
|
| 64 | 1 |
0.9%
|
|
| 75 | 3 |
2.6%
|
|
| 80 | 3 |
2.6%
|
|
| 90 | 1 |
0.9%
|
|
| 100 | 3 |
2.6%
|
|
| 110 | 1 |
0.9%
|
|
| 120 | 4 |
3.4%
|
|
| 180 | 1 |
0.9%
|
|
| 192 | 2 |
1.7%
|
|
| 200 | 2 |
1.7%
|
|
| 216 | 2 |
1.7%
|
|
| 240 | 1 |
0.9%
|
|
| 288 | 1 |
0.9%
|
|
| 400 | 1 |
0.9%
|
|
| 720 | 1 |
0.9%
|
|
| 800 | 1 |
0.9%
|
|
| 1000 | 1 |
0.9%
|
|
| 1200 | 1 |
0.9%
|
|
| 2500 | 1 |
0.9%
|
|
| 5000 | 1 |
0.9%
|
|
| 8760 | 1 |
0.9%
|
|
| Sysmiss | 241 |