| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 383 |
39.1%
|
| 1 | One hour or less | 74 |
7.6%
|
| 2 | 16 |
1.6%
|
|
| 3 | 39 |
4%
|
|
| 4 | 17 |
1.7%
|
|
| 5 | 36 |
3.7%
|
|
| 6 | 13 |
1.3%
|
|
| 7 | 2 |
0.2%
|
|
| 8 | 12 |
1.2%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 4 |
0.4%
|
|
| 12 | 5 |
0.5%
|
|
| 14 | 1 |
0.1%
|
|
| 15 | 1 |
0.1%
|
|
| 16 | 1 |
0.1%
|
|
| 20 | 4 |
0.4%
|
|
| 21 | 1 |
0.1%
|
|
| 24 | 28 |
2.9%
|
|
| 30 | 26 |
2.7%
|
|
| 31 | 2 |
0.2%
|
|
| 32 | 1 |
0.1%
|
|
| 35 | 8 |
0.8%
|
|
| 36 | 19 |
1.9%
|
|
| 37 | 1 |
0.1%
|
|
| 40 | 36 |
3.7%
|
|
| 42 | 4 |
0.4%
|
|
| 45 | 10 |
1%
|
|
| 48 | 61 |
6.2%
|
|
| 50 | 18 |
1.8%
|
|
| 56 | 11 |
1.1%
|
|
| 60 | 26 |
2.7%
|
|
| 63 | 1 |
0.1%
|
|
| 64 | 1 |
0.1%
|
|
| 68 | 1 |
0.1%
|
|
| 70 | 4 |
0.4%
|
|
| 72 | 37 |
3.8%
|
|
| 75 | 1 |
0.1%
|
|
| 76 | 1 |
0.1%
|
|
| 78 | 2 |
0.2%
|
|
| 80 | 10 |
1%
|
|
| 82 | 1 |
0.1%
|
|
| 84 | 1 |
0.1%
|
|
| 90 | 5 |
0.5%
|
|
| 96 | 10 |
1%
|
|
| 100 | 2 |
0.2%
|
|
| 108 | 1 |
0.1%
|
|
| 112 | 2 |
0.2%
|
|
| 120 | 12 |
1.2%
|
|
| 125 | 1 |
0.1%
|
|
| 168 | 1 |
0.1%
|
|
| 200 | 1 |
0.1%
|
|
| 240 | 3 |
0.3%
|
|
| 250 | 1 |
0.1%
|
|
| 288 | 1 |
0.1%
|
|
| 300 | 3 |
0.3%
|
|
| 336 | 1 |
0.1%
|
|
| 360 | 1 |
0.1%
|
|
| 365 | 1 |
0.1%
|
|
| 400 | 1 |
0.1%
|
|
| 450 | 1 |
0.1%
|
|
| 480 | 1 |
0.1%
|
|
| 500 | 3 |
0.3%
|
|
| 624 | 1 |
0.1%
|
|
| 720 | 2 |
0.2%
|
|
| 750 | 1 |
0.1%
|
|
| 1200 | 1 |
0.1%
|
|
| 1500 | 1 |
0.1%
|