| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 52 |
10.3%
|
| 1 | One hour or less | 14 |
2.8%
|
| 2 | 11 |
2.2%
|
|
| 3 | 9 |
1.8%
|
|
| 4 | 8 |
1.6%
|
|
| 5 | 9 |
1.8%
|
|
| 6 | 5 |
1%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 19 |
3.8%
|
|
| 9 | 2 |
0.4%
|
|
| 10 | 20 |
4%
|
|
| 12 | 5 |
1%
|
|
| 14 | 1 |
0.2%
|
|
| 15 | 4 |
0.8%
|
|
| 16 | 12 |
2.4%
|
|
| 18 | 4 |
0.8%
|
|
| 20 | 24 |
4.8%
|
|
| 22 | 2 |
0.4%
|
|
| 24 | 21 |
4.2%
|
|
| 25 | 3 |
0.6%
|
|
| 27 | 1 |
0.2%
|
|
| 28 | 1 |
0.2%
|
|
| 30 | 16 |
3.2%
|
|
| 32 | 12 |
2.4%
|
|
| 35 | 2 |
0.4%
|
|
| 36 | 3 |
0.6%
|
|
| 40 | 32 |
6.4%
|
|
| 42 | 1 |
0.2%
|
|
| 44 | 2 |
0.4%
|
|
| 45 | 2 |
0.4%
|
|
| 46 | 1 |
0.2%
|
|
| 48 | 43 |
8.5%
|
|
| 50 | 11 |
2.2%
|
|
| 52 | 1 |
0.2%
|
|
| 56 | 7 |
1.4%
|
|
| 60 | 9 |
1.8%
|
|
| 64 | 1 |
0.2%
|
|
| 70 | 3 |
0.6%
|
|
| 72 | 11 |
2.2%
|
|
| 78 | 1 |
0.2%
|
|
| 80 | 7 |
1.4%
|
|
| 85 | 1 |
0.2%
|
|
| 88 | 1 |
0.2%
|
|
| 90 | 4 |
0.8%
|
|
| 96 | 7 |
1.4%
|
|
| 100 | 11 |
2.2%
|
|
| 106 | 1 |
0.2%
|
|
| 108 | 1 |
0.2%
|
|
| 120 | 12 |
2.4%
|
|
| 130 | 1 |
0.2%
|
|
| 140 | 1 |
0.2%
|
|
| 150 | 6 |
1.2%
|
|
| 160 | 14 |
2.8%
|
|
| 168 | 8 |
1.6%
|
|
| 176 | 1 |
0.2%
|
|
| 180 | 2 |
0.4%
|
|
| 192 | 9 |
1.8%
|
|
| 200 | 3 |
0.6%
|
|
| 208 | 2 |
0.4%
|
|
| 210 | 1 |
0.2%
|
|
| 236 | 1 |
0.2%
|
|
| 240 | 5 |
1%
|
|
| 250 | 1 |
0.2%
|
|
| 300 | 2 |
0.4%
|
|
| 320 | 1 |
0.2%
|
|
| 350 | 1 |
0.2%
|
|
| 384 | 3 |
0.6%
|
|
| 400 | 2 |
0.4%
|
|
| 480 | 2 |
0.4%
|
|
| 500 | 2 |
0.4%
|
|
| 576 | 3 |
0.6%
|
|
| 744 | 1 |
0.2%
|
|
| Sysmiss | 484 |