| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 618 |
44%
|
| 1 | One hour or less | 380 |
27%
|
| 2 | 33 |
2.3%
|
|
| 3 | 22 |
1.6%
|
|
| 4 | 6 |
0.4%
|
|
| 5 | 15 |
1.1%
|
|
| 6 | 6 |
0.4%
|
|
| 7 | 5 |
0.4%
|
|
| 8 | 16 |
1.1%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 19 |
1.4%
|
|
| 12 | 18 |
1.3%
|
|
| 15 | 1 |
0.1%
|
|
| 16 | 2 |
0.1%
|
|
| 18 | 34 |
2.4%
|
|
| 20 | 6 |
0.4%
|
|
| 24 | 89 |
6.3%
|
|
| 25 | 4 |
0.3%
|
|
| 26 | 1 |
0.1%
|
|
| 30 | 5 |
0.4%
|
|
| 32 | 2 |
0.1%
|
|
| 35 | 1 |
0.1%
|
|
| 36 | 22 |
1.6%
|
|
| 40 | 3 |
0.2%
|
|
| 42 | 3 |
0.2%
|
|
| 46 | 2 |
0.1%
|
|
| 48 | 26 |
1.9%
|
|
| 49 | 1 |
0.1%
|
|
| 50 | 2 |
0.1%
|
|
| 54 | 1 |
0.1%
|
|
| 56 | 3 |
0.2%
|
|
| 58 | 1 |
0.1%
|
|
| 60 | 9 |
0.6%
|
|
| 69 | 1 |
0.1%
|
|
| 70 | 5 |
0.4%
|
|
| 72 | 2 |
0.1%
|
|
| 74 | 1 |
0.1%
|
|
| 75 | 1 |
0.1%
|
|
| 78 | 1 |
0.1%
|
|
| 80 | 1 |
0.1%
|
|
| 90 | 1 |
0.1%
|
|
| 96 | 1 |
0.1%
|
|
| 100 | 7 |
0.5%
|
|
| 120 | 7 |
0.5%
|
|
| 128 | 1 |
0.1%
|
|
| 144 | 1 |
0.1%
|
|
| 160 | 6 |
0.4%
|
|
| 168 | 8 |
0.6%
|
|
| 180 | 1 |
0.1%
|
|
| 240 | 1 |
0.1%
|
|
| 312 | 1 |
0.1%
|
|
| 600 | 1 |
0.1%
|
|
| Sysmiss | 1550 |