| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 |
7.8%
|
| 1 | One hour or less | 26 |
8.1%
|
| 2 | 16 |
5%
|
|
| 3 | 12 |
3.8%
|
|
| 4 | 6 |
1.9%
|
|
| 5 | 5 |
1.6%
|
|
| 6 | 4 |
1.3%
|
|
| 7 | 2 |
0.6%
|
|
| 8 | 5 |
1.6%
|
|
| 9 | 1 |
0.3%
|
|
| 12 | 7 |
2.2%
|
|
| 16 | 3 |
0.9%
|
|
| 18 | 1 |
0.3%
|
|
| 24 | 15 |
4.7%
|
|
| 28 | 2 |
0.6%
|
|
| 30 | 14 |
4.4%
|
|
| 32 | 4 |
1.3%
|
|
| 35 | 2 |
0.6%
|
|
| 36 | 15 |
4.7%
|
|
| 44 | 1 |
0.3%
|
|
| 48 | 52 |
16.3%
|
|
| 56 | 6 |
1.9%
|
|
| 60 | 4 |
1.3%
|
|
| 62 | 1 |
0.3%
|
|
| 64 | 1 |
0.3%
|
|
| 72 | 31 |
9.7%
|
|
| 76 | 2 |
0.6%
|
|
| 82 | 1 |
0.3%
|
|
| 84 | 1 |
0.3%
|
|
| 88 | 2 |
0.6%
|
|
| 90 | 1 |
0.3%
|
|
| 92 | 3 |
0.9%
|
|
| 96 | 22 |
6.9%
|
|
| 120 | 3 |
0.9%
|
|
| 125 | 1 |
0.3%
|
|
| 144 | 2 |
0.6%
|
|
| 150 | 2 |
0.6%
|
|
| 240 | 2 |
0.6%
|
|
| 336 | 7 |
2.2%
|
|
| 354 | 1 |
0.3%
|
|
| 400 | 1 |
0.3%
|
|
| 480 | 2 |
0.6%
|
|
| 495 | 1 |
0.3%
|
|
| 660 | 1 |
0.3%
|
|
| 960 | 1 |
0.3%
|
|
| 1440 | 2 |
0.6%
|
|
| 1449 | 1 |
0.3%
|
|
| Sysmiss | 280 |