| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
5.3%
|
| 1 | One hour or less | 12 |
4%
|
| 5 | 2 |
0.7%
|
|
| 6 | 1 |
0.3%
|
|
| 8 | 2 |
0.7%
|
|
| 10 | 3 |
1%
|
|
| 12 | 1 |
0.3%
|
|
| 15 | 1 |
0.3%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 4 |
1.3%
|
|
| 24 | 4 |
1.3%
|
|
| 30 | 50 |
16.6%
|
|
| 32 | 8 |
2.7%
|
|
| 34 | 1 |
0.3%
|
|
| 35 | 6 |
2%
|
|
| 36 | 3 |
1%
|
|
| 38 | 1 |
0.3%
|
|
| 40 | 33 |
11%
|
|
| 42 | 1 |
0.3%
|
|
| 48 | 8 |
2.7%
|
|
| 50 | 14 |
4.7%
|
|
| 56 | 1 |
0.3%
|
|
| 60 | 20 |
6.6%
|
|
| 67 | 1 |
0.3%
|
|
| 80 | 18 |
6%
|
|
| 88 | 1 |
0.3%
|
|
| 90 | 5 |
1.7%
|
|
| 96 | 5 |
1.7%
|
|
| 100 | 18 |
6%
|
|
| 104 | 1 |
0.3%
|
|
| 110 | 1 |
0.3%
|
|
| 120 | 23 |
7.6%
|
|
| 125 | 1 |
0.3%
|
|
| 140 | 3 |
1%
|
|
| 144 | 1 |
0.3%
|
|
| 150 | 4 |
1.3%
|
|
| 160 | 3 |
1%
|
|
| 168 | 1 |
0.3%
|
|
| 180 | 2 |
0.7%
|
|
| 200 | 3 |
1%
|
|
| 210 | 1 |
0.3%
|
|
| 250 | 2 |
0.7%
|
|
| 300 | 1 |
0.3%
|
|
| 430 | 1 |
0.3%
|
|
| 480 | 1 |
0.3%
|
|
| 500 | 3 |
1%
|
|
| 530 | 1 |
0.3%
|
|
| 576 | 1 |
0.3%
|
|
| 700 | 1 |
0.3%
|
|
| 720 | 2 |
0.7%
|
|
| 860 | 1 |
0.3%
|
|
| 1000 | 2 |
0.7%
|
|
| Sysmiss | 322 |