| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 139 |
45.3%
|
| 1 | One hour or less | 15 |
4.9%
|
| 2 | 2 |
0.7%
|
|
| 3 | 7 |
2.3%
|
|
| 4 | 2 |
0.7%
|
|
| 5 | 4 |
1.3%
|
|
| 7 | 1 |
0.3%
|
|
| 8 | 4 |
1.3%
|
|
| 10 | 4 |
1.3%
|
|
| 14 | 2 |
0.7%
|
|
| 15 | 1 |
0.3%
|
|
| 16 | 2 |
0.7%
|
|
| 20 | 6 |
2%
|
|
| 24 | 9 |
2.9%
|
|
| 25 | 1 |
0.3%
|
|
| 30 | 14 |
4.6%
|
|
| 32 | 2 |
0.7%
|
|
| 35 | 3 |
1%
|
|
| 36 | 4 |
1.3%
|
|
| 40 | 10 |
3.3%
|
|
| 42 | 1 |
0.3%
|
|
| 45 | 2 |
0.7%
|
|
| 48 | 10 |
3.3%
|
|
| 50 | 3 |
1%
|
|
| 52 | 1 |
0.3%
|
|
| 56 | 1 |
0.3%
|
|
| 60 | 4 |
1.3%
|
|
| 69 | 1 |
0.3%
|
|
| 70 | 2 |
0.7%
|
|
| 72 | 6 |
2%
|
|
| 74 | 1 |
0.3%
|
|
| 78 | 1 |
0.3%
|
|
| 80 | 1 |
0.3%
|
|
| 90 | 1 |
0.3%
|
|
| 96 | 3 |
1%
|
|
| 98 | 1 |
0.3%
|
|
| 100 | 3 |
1%
|
|
| 110 | 1 |
0.3%
|
|
| 112 | 1 |
0.3%
|
|
| 120 | 3 |
1%
|
|
| 140 | 1 |
0.3%
|
|
| 150 | 2 |
0.7%
|
|
| 160 | 1 |
0.3%
|
|
| 192 | 1 |
0.3%
|
|
| 195 | 1 |
0.3%
|
|
| 200 | 4 |
1.3%
|
|
| 203 | 1 |
0.3%
|
|
| 216 | 1 |
0.3%
|
|
| 220 | 1 |
0.3%
|
|
| 250 | 1 |
0.3%
|
|
| 300 | 1 |
0.3%
|
|
| 336 | 1 |
0.3%
|
|
| 360 | 2 |
0.7%
|
|
| 400 | 2 |
0.7%
|
|
| 416 | 1 |
0.3%
|
|
| 480 | 1 |
0.3%
|
|
| 492 | 1 |
0.3%
|
|
| 500 | 1 |
0.3%
|
|
| 600 | 1 |
0.3%
|
|
| 1600 | 1 |
0.3%
|
|
| 1920 | 1 |
0.3%
|
|
| 2000 | 1 |
0.3%
|