| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 31 |
10%
|
| 1 | One hour or less | 3 |
1%
|
| 4 | 1 |
0.3%
|
|
| 5 | 1 |
0.3%
|
|
| 7 | 2 |
0.6%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 2 |
0.6%
|
|
| 12 | 5 |
1.6%
|
|
| 14 | 2 |
0.6%
|
|
| 15 | 5 |
1.6%
|
|
| 16 | 1 |
0.3%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 6 |
1.9%
|
|
| 24 | 8 |
2.6%
|
|
| 25 | 1 |
0.3%
|
|
| 27 | 1 |
0.3%
|
|
| 30 | 13 |
4.2%
|
|
| 32 | 3 |
1%
|
|
| 36 | 3 |
1%
|
|
| 38 | 1 |
0.3%
|
|
| 40 | 7 |
2.3%
|
|
| 48 | 15 |
4.8%
|
|
| 50 | 7 |
2.3%
|
|
| 56 | 4 |
1.3%
|
|
| 60 | 6 |
1.9%
|
|
| 64 | 1 |
0.3%
|
|
| 65 | 1 |
0.3%
|
|
| 70 | 3 |
1%
|
|
| 72 | 4 |
1.3%
|
|
| 80 | 18 |
5.8%
|
|
| 86 | 1 |
0.3%
|
|
| 90 | 12 |
3.9%
|
|
| 92 | 1 |
0.3%
|
|
| 96 | 14 |
4.5%
|
|
| 100 | 13 |
4.2%
|
|
| 110 | 1 |
0.3%
|
|
| 112 | 2 |
0.6%
|
|
| 120 | 5 |
1.6%
|
|
| 126 | 1 |
0.3%
|
|
| 140 | 2 |
0.6%
|
|
| 144 | 1 |
0.3%
|
|
| 150 | 8 |
2.6%
|
|
| 160 | 33 |
10.6%
|
|
| 180 | 5 |
1.6%
|
|
| 192 | 3 |
1%
|
|
| 200 | 14 |
4.5%
|
|
| 208 | 1 |
0.3%
|
|
| 220 | 1 |
0.3%
|
|
| 240 | 8 |
2.6%
|
|
| 245 | 1 |
0.3%
|
|
| 250 | 1 |
0.3%
|
|
| 256 | 2 |
0.6%
|
|
| 260 | 3 |
1%
|
|
| 270 | 1 |
0.3%
|
|
| 288 | 1 |
0.3%
|
|
| 320 | 7 |
2.3%
|
|
| 324 | 1 |
0.3%
|
|
| 340 | 1 |
0.3%
|
|
| 345 | 1 |
0.3%
|
|
| 360 | 2 |
0.6%
|
|
| 365 | 1 |
0.3%
|
|
| 375 | 1 |
0.3%
|
|
| 400 | 4 |
1.3%
|
|
| 800 | 1 |
0.3%
|