| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 78 |
23.1%
|
| 1 | One hour or less | 16 |
4.7%
|
| 2 | 5 |
1.5%
|
|
| 3 | 49 |
14.5%
|
|
| 4 | 24 |
7.1%
|
|
| 5 | 19 |
5.6%
|
|
| 6 | 8 |
2.4%
|
|
| 7 | 1 |
0.3%
|
|
| 8 | 2 |
0.6%
|
|
| 10 | 2 |
0.6%
|
|
| 12 | 3 |
0.9%
|
|
| 13 | 1 |
0.3%
|
|
| 14 | 1 |
0.3%
|
|
| 15 | 1 |
0.3%
|
|
| 16 | 2 |
0.6%
|
|
| 17 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| 24 | 6 |
1.8%
|
|
| 25 | 1 |
0.3%
|
|
| 30 | 34 |
10.1%
|
|
| 33 | 2 |
0.6%
|
|
| 34 | 1 |
0.3%
|
|
| 35 | 1 |
0.3%
|
|
| 36 | 3 |
0.9%
|
|
| 38 | 1 |
0.3%
|
|
| 40 | 20 |
5.9%
|
|
| 42 | 1 |
0.3%
|
|
| 45 | 4 |
1.2%
|
|
| 48 | 22 |
6.5%
|
|
| 50 | 2 |
0.6%
|
|
| 52 | 1 |
0.3%
|
|
| 54 | 1 |
0.3%
|
|
| 60 | 5 |
1.5%
|
|
| 72 | 13 |
3.8%
|
|
| 80 | 1 |
0.3%
|
|
| 84 | 1 |
0.3%
|
|
| 90 | 3 |
0.9%
|
|
| 120 | 1 |
0.3%
|
|
| Sysmiss | 375 |