| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.7%
|
| 1 | One hour or less | 0 |
0%
|
| 12 | 2 |
1.1%
|
|
| 14 | 1 |
0.5%
|
|
| 16 | 4 |
2.2%
|
|
| 17 | 1 |
0.5%
|
|
| 18 | 1 |
0.5%
|
|
| 20 | 3 |
1.6%
|
|
| 24 | 14 |
7.7%
|
|
| 25 | 2 |
1.1%
|
|
| 28 | 2 |
1.1%
|
|
| 30 | 15 |
8.2%
|
|
| 32 | 11 |
6%
|
|
| 33 | 3 |
1.6%
|
|
| 34 | 4 |
2.2%
|
|
| 35 | 5 |
2.7%
|
|
| 36 | 16 |
8.7%
|
|
| 37 | 1 |
0.5%
|
|
| 38 | 4 |
2.2%
|
|
| 40 | 9 |
4.9%
|
|
| 41 | 2 |
1.1%
|
|
| 42 | 2 |
1.1%
|
|
| 44 | 1 |
0.5%
|
|
| 45 | 2 |
1.1%
|
|
| 46 | 2 |
1.1%
|
|
| 48 | 24 |
13.1%
|
|
| 51 | 1 |
0.5%
|
|
| 53 | 1 |
0.5%
|
|
| 54 | 1 |
0.5%
|
|
| 56 | 2 |
1.1%
|
|
| 58 | 2 |
1.1%
|
|
| 60 | 5 |
2.7%
|
|
| 64 | 1 |
0.5%
|
|
| 65 | 1 |
0.5%
|
|
| 68 | 1 |
0.5%
|
|
| 70 | 1 |
0.5%
|
|
| 72 | 19 |
10.4%
|
|
| 76 | 2 |
1.1%
|
|
| 92 | 1 |
0.5%
|
|
| 96 | 5 |
2.7%
|
|
| 120 | 1 |
0.5%
|
|
| 126 | 1 |
0.5%
|
|
| 162 | 1 |
0.5%
|
|
| 288 | 1 |
0.5%
|
|
| Sysmiss | 175 |