| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 35 |
20.2%
|
| 1 | One hour or less | 0 |
0%
|
| 12 | 1 |
0.6%
|
|
| 20 | 2 |
1.2%
|
|
| 24 | 3 |
1.7%
|
|
| 30 | 2 |
1.2%
|
|
| 34 | 1 |
0.6%
|
|
| 40 | 1 |
0.6%
|
|
| 48 | 2 |
1.2%
|
|
| 50 | 4 |
2.3%
|
|
| 56 | 1 |
0.6%
|
|
| 60 | 4 |
2.3%
|
|
| 64 | 1 |
0.6%
|
|
| 72 | 2 |
1.2%
|
|
| 80 | 2 |
1.2%
|
|
| 96 | 4 |
2.3%
|
|
| 100 | 4 |
2.3%
|
|
| 120 | 8 |
4.6%
|
|
| 130 | 1 |
0.6%
|
|
| 140 | 1 |
0.6%
|
|
| 144 | 1 |
0.6%
|
|
| 150 | 2 |
1.2%
|
|
| 160 | 1 |
0.6%
|
|
| 180 | 4 |
2.3%
|
|
| 192 | 3 |
1.7%
|
|
| 216 | 1 |
0.6%
|
|
| 240 | 7 |
4%
|
|
| 250 | 2 |
1.2%
|
|
| 251 | 1 |
0.6%
|
|
| 252 | 3 |
1.7%
|
|
| 260 | 7 |
4%
|
|
| 280 | 2 |
1.2%
|
|
| 288 | 6 |
3.5%
|
|
| 300 | 7 |
4%
|
|
| 320 | 1 |
0.6%
|
|
| 340 | 1 |
0.6%
|
|
| 360 | 1 |
0.6%
|
|
| 384 | 11 |
6.4%
|
|
| 400 | 6 |
3.5%
|
|
| 424 | 1 |
0.6%
|
|
| 432 | 1 |
0.6%
|
|
| 480 | 12 |
6.9%
|
|
| 500 | 3 |
1.7%
|
|
| 540 | 1 |
0.6%
|
|
| 560 | 1 |
0.6%
|
|
| 576 | 1 |
0.6%
|
|
| 620 | 1 |
0.6%
|
|
| 672 | 1 |
0.6%
|
|
| 800 | 1 |
0.6%
|
|
| 960 | 3 |
1.7%
|
|
| 1500 | 1 |
0.6%
|
|
| Sysmiss | 181 |