| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
3.8%
|
| 1 | One hour or less | 24 |
6.1%
|
| 2 | 13 |
3.3%
|
|
| 3 | 3 |
0.8%
|
|
| 4 | 12 |
3.1%
|
|
| 5 | 6 |
1.5%
|
|
| 6 | 1 |
0.3%
|
|
| 7 | 1 |
0.3%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| 24 | 46 |
11.7%
|
|
| 30 | 10 |
2.6%
|
|
| 32 | 1 |
0.3%
|
|
| 33 | 1 |
0.3%
|
|
| 34 | 1 |
0.3%
|
|
| 35 | 5 |
1.3%
|
|
| 36 | 5 |
1.3%
|
|
| 38 | 2 |
0.5%
|
|
| 40 | 2 |
0.5%
|
|
| 42 | 1 |
0.3%
|
|
| 45 | 1 |
0.3%
|
|
| 48 | 116 |
29.6%
|
|
| 50 | 1 |
0.3%
|
|
| 60 | 1 |
0.3%
|
|
| 72 | 93 |
23.7%
|
|
| 78 | 4 |
1%
|
|
| 86 | 2 |
0.5%
|
|
| 90 | 1 |
0.3%
|
|
| 96 | 3 |
0.8%
|
|
| 120 | 9 |
2.3%
|
|
| 140 | 1 |
0.3%
|
|
| 160 | 1 |
0.3%
|
|
| 168 | 2 |
0.5%
|
|
| 190 | 1 |
0.3%
|
|
| 240 | 4 |
1%
|