| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
2.2%
|
| 1 | One hour or less | 23 |
7.1%
|
| 2 | 1 |
0.3%
|
|
| 3 | 10 |
3.1%
|
|
| 4 | 5 |
1.6%
|
|
| 5 | 16 |
5%
|
|
| 8 | 20 |
6.2%
|
|
| 9 | 1 |
0.3%
|
|
| 10 | 21 |
6.5%
|
|
| 12 | 6 |
1.9%
|
|
| 15 | 7 |
2.2%
|
|
| 16 | 6 |
1.9%
|
|
| 20 | 22 |
6.8%
|
|
| 21 | 2 |
0.6%
|
|
| 24 | 10 |
3.1%
|
|
| 25 | 1 |
0.3%
|
|
| 30 | 44 |
13.7%
|
|
| 32 | 5 |
1.6%
|
|
| 35 | 7 |
2.2%
|
|
| 36 | 5 |
1.6%
|
|
| 38 | 1 |
0.3%
|
|
| 40 | 27 |
8.4%
|
|
| 42 | 1 |
0.3%
|
|
| 46 | 1 |
0.3%
|
|
| 48 | 8 |
2.5%
|
|
| 50 | 18 |
5.6%
|
|
| 60 | 9 |
2.8%
|
|
| 70 | 1 |
0.3%
|
|
| 80 | 10 |
3.1%
|
|
| 84 | 1 |
0.3%
|
|
| 90 | 2 |
0.6%
|
|
| 96 | 2 |
0.6%
|
|
| 100 | 4 |
1.2%
|
|
| 120 | 6 |
1.9%
|
|
| 125 | 4 |
1.2%
|
|
| 168 | 1 |
0.3%
|
|
| 170 | 1 |
0.3%
|
|
| 200 | 2 |
0.6%
|
|
| 216 | 1 |
0.3%
|
|
| 240 | 1 |
0.3%
|
|
| 336 | 1 |
0.3%
|
|
| 500 | 1 |
0.3%
|
|
| Sysmiss | 301 |