| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
3.3%
|
| 1 | One hour or less | 40 |
3.9%
|
| 2 | 2 |
0.2%
|
|
| 3 | 1 |
0.1%
|
|
| 4 | 1 |
0.1%
|
|
| 6 | 1 |
0.1%
|
|
| 10 | 2 |
0.2%
|
|
| 12 | 2 |
0.2%
|
|
| 13 | 1 |
0.1%
|
|
| 14 | 1 |
0.1%
|
|
| 15 | 1 |
0.1%
|
|
| 20 | 3 |
0.3%
|
|
| 24 | 17 |
1.7%
|
|
| 28 | 1 |
0.1%
|
|
| 29 | 1 |
0.1%
|
|
| 30 | 187 |
18.2%
|
|
| 31 | 5 |
0.5%
|
|
| 32 | 11 |
1.1%
|
|
| 33 | 3 |
0.3%
|
|
| 35 | 20 |
2%
|
|
| 36 | 15 |
1.5%
|
|
| 38 | 2 |
0.2%
|
|
| 40 | 14 |
1.4%
|
|
| 42 | 3 |
0.3%
|
|
| 45 | 17 |
1.7%
|
|
| 46 | 2 |
0.2%
|
|
| 48 | 239 |
23.3%
|
|
| 49 | 2 |
0.2%
|
|
| 50 | 8 |
0.8%
|
|
| 52 | 1 |
0.1%
|
|
| 55 | 2 |
0.2%
|
|
| 56 | 3 |
0.3%
|
|
| 58 | 3 |
0.3%
|
|
| 59 | 2 |
0.2%
|
|
| 60 | 19 |
1.9%
|
|
| 62 | 5 |
0.5%
|
|
| 63 | 2 |
0.2%
|
|
| 64 | 1 |
0.1%
|
|
| 65 | 9 |
0.9%
|
|
| 66 | 2 |
0.2%
|
|
| 68 | 2 |
0.2%
|
|
| 70 | 6 |
0.6%
|
|
| 71 | 1 |
0.1%
|
|
| 72 | 234 |
22.8%
|
|
| 73 | 3 |
0.3%
|
|
| 74 | 3 |
0.3%
|
|
| 75 | 5 |
0.5%
|
|
| 76 | 1 |
0.1%
|
|
| 78 | 6 |
0.6%
|
|
| 80 | 7 |
0.7%
|
|
| 81 | 2 |
0.2%
|
|
| 82 | 4 |
0.4%
|
|
| 84 | 4 |
0.4%
|
|
| 85 | 1 |
0.1%
|
|
| 86 | 1 |
0.1%
|
|
| 90 | 5 |
0.5%
|
|
| 92 | 7 |
0.7%
|
|
| 94 | 1 |
0.1%
|
|
| 95 | 4 |
0.4%
|
|
| 96 | 15 |
1.5%
|
|
| 100 | 3 |
0.3%
|
|
| 110 | 1 |
0.1%
|
|
| 120 | 12 |
1.2%
|
|
| 125 | 1 |
0.1%
|
|
| 132 | 1 |
0.1%
|
|
| 138 | 1 |
0.1%
|
|
| 160 | 1 |
0.1%
|
|
| 216 | 1 |
0.1%
|
|
| 228 | 1 |
0.1%
|
|
| 236 | 1 |
0.1%
|
|
| 240 | 2 |
0.2%
|
|
| 300 | 1 |
0.1%
|
|
| 360 | 1 |
0.1%
|
|
| 696 | 1 |
0.1%
|