| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 74 |
23.6%
|
| 1 | One hour or less | 0 |
0%
|
| 4 | 1 |
0.3%
|
|
| 5 | 2 |
0.6%
|
|
| 6 | 1 |
0.3%
|
|
| 8 | 3 |
1%
|
|
| 10 | 2 |
0.6%
|
|
| 11 | 2 |
0.6%
|
|
| 12 | 2 |
0.6%
|
|
| 14 | 1 |
0.3%
|
|
| 16 | 6 |
1.9%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| 24 | 6 |
1.9%
|
|
| 25 | 1 |
0.3%
|
|
| 28 | 1 |
0.3%
|
|
| 30 | 48 |
15.3%
|
|
| 31 | 1 |
0.3%
|
|
| 32 | 3 |
1%
|
|
| 33 | 1 |
0.3%
|
|
| 34 | 1 |
0.3%
|
|
| 35 | 9 |
2.9%
|
|
| 36 | 7 |
2.2%
|
|
| 37 | 1 |
0.3%
|
|
| 38 | 2 |
0.6%
|
|
| 39 | 1 |
0.3%
|
|
| 40 | 14 |
4.5%
|
|
| 45 | 4 |
1.3%
|
|
| 47 | 1 |
0.3%
|
|
| 48 | 54 |
17.3%
|
|
| 50 | 6 |
1.9%
|
|
| 55 | 1 |
0.3%
|
|
| 60 | 3 |
1%
|
|
| 70 | 1 |
0.3%
|
|
| 72 | 46 |
14.7%
|
|
| 80 | 1 |
0.3%
|
|
| 96 | 2 |
0.6%
|
|
| 153 | 1 |
0.3%
|
|
| 166 | 1 |
0.3%
|
|
| Sysmiss | 336 |