| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
12.8%
|
| 1 | One hour or less | 2 |
1.3%
|
| 2 | 2 |
1.3%
|
|
| 3 | 1 |
0.6%
|
|
| 4 | 2 |
1.3%
|
|
| 7 | 1 |
0.6%
|
|
| 8 | 1 |
0.6%
|
|
| 12 | 1 |
0.6%
|
|
| 15 | 1 |
0.6%
|
|
| 20 | 1 |
0.6%
|
|
| 28 | 1 |
0.6%
|
|
| 30 | 37 |
23.7%
|
|
| 31 | 5 |
3.2%
|
|
| 32 | 3 |
1.9%
|
|
| 33 | 18 |
11.5%
|
|
| 35 | 6 |
3.8%
|
|
| 36 | 1 |
0.6%
|
|
| 40 | 2 |
1.3%
|
|
| 42 | 2 |
1.3%
|
|
| 45 | 7 |
4.5%
|
|
| 48 | 4 |
2.6%
|
|
| 50 | 1 |
0.6%
|
|
| 52 | 2 |
1.3%
|
|
| 53 | 1 |
0.6%
|
|
| 56 | 1 |
0.6%
|
|
| 60 | 1 |
0.6%
|
|
| 68 | 1 |
0.6%
|
|
| 72 | 9 |
5.8%
|
|
| 73 | 9 |
5.8%
|
|
| 74 | 1 |
0.6%
|
|
| 75 | 1 |
0.6%
|
|
| 76 | 1 |
0.6%
|
|
| 78 | 3 |
1.9%
|
|
| 100 | 1 |
0.6%
|
|
| 150 | 1 |
0.6%
|
|
| 166 | 1 |
0.6%
|
|
| 180 | 1 |
0.6%
|
|
| 192 | 1 |
0.6%
|
|
| 320 | 1 |
0.6%
|
|
| 336 | 1 |
0.6%
|