| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 |
5.8%
|
| 1 | One hour or less | 5 |
1.2%
|
| 2 | 2 |
0.5%
|
|
| 4 | 2 |
0.5%
|
|
| 5 | 1 |
0.2%
|
|
| 8 | 1 |
0.2%
|
|
| 10 | 2 |
0.5%
|
|
| 12 | 2 |
0.5%
|
|
| 20 | 3 |
0.7%
|
|
| 24 | 5 |
1.2%
|
|
| 28 | 1 |
0.2%
|
|
| 30 | 47 |
10.9%
|
|
| 31 | 9 |
2.1%
|
|
| 32 | 22 |
5.1%
|
|
| 33 | 2 |
0.5%
|
|
| 34 | 2 |
0.5%
|
|
| 35 | 12 |
2.8%
|
|
| 36 | 32 |
7.4%
|
|
| 38 | 10 |
2.3%
|
|
| 39 | 2 |
0.5%
|
|
| 40 | 3 |
0.7%
|
|
| 42 | 8 |
1.9%
|
|
| 45 | 1 |
0.2%
|
|
| 48 | 48 |
11.2%
|
|
| 50 | 4 |
0.9%
|
|
| 52 | 1 |
0.2%
|
|
| 53 | 1 |
0.2%
|
|
| 56 | 1 |
0.2%
|
|
| 60 | 18 |
4.2%
|
|
| 62 | 1 |
0.2%
|
|
| 65 | 8 |
1.9%
|
|
| 68 | 3 |
0.7%
|
|
| 70 | 17 |
4%
|
|
| 72 | 42 |
9.8%
|
|
| 73 | 1 |
0.2%
|
|
| 75 | 4 |
0.9%
|
|
| 78 | 1 |
0.2%
|
|
| 80 | 7 |
1.6%
|
|
| 82 | 3 |
0.7%
|
|
| 84 | 1 |
0.2%
|
|
| 85 | 2 |
0.5%
|
|
| 86 | 2 |
0.5%
|
|
| 90 | 4 |
0.9%
|
|
| 92 | 4 |
0.9%
|
|
| 96 | 6 |
1.4%
|
|
| 97 | 1 |
0.2%
|
|
| 98 | 2 |
0.5%
|
|
| 100 | 1 |
0.2%
|
|
| 120 | 8 |
1.9%
|
|
| 125 | 1 |
0.2%
|
|
| 140 | 1 |
0.2%
|
|
| 144 | 4 |
0.9%
|
|
| 148 | 1 |
0.2%
|
|
| 150 | 1 |
0.2%
|
|
| 155 | 1 |
0.2%
|
|
| 168 | 1 |
0.2%
|
|
| 172 | 1 |
0.2%
|
|
| 180 | 2 |
0.5%
|
|
| 192 | 1 |
0.2%
|
|
| 198 | 1 |
0.2%
|
|
| 214 | 1 |
0.2%
|
|
| 216 | 1 |
0.2%
|
|
| 221 | 1 |
0.2%
|
|
| 230 | 1 |
0.2%
|
|
| 240 | 5 |
1.2%
|
|
| 248 | 1 |
0.2%
|
|
| 280 | 1 |
0.2%
|
|
| 288 | 4 |
0.9%
|
|
| 300 | 1 |
0.2%
|
|
| 336 | 1 |
0.2%
|
|
| 350 | 1 |
0.2%
|
|
| 360 | 1 |
0.2%
|
|
| 400 | 1 |
0.2%
|
|
| 480 | 1 |
0.2%
|
|
| 624 | 1 |
0.2%
|
|
| 720 | 1 |
0.2%
|
|
| 768 | 1 |
0.2%
|
|
| 1080 | 1 |
0.2%
|