| Value | Category | Cases | |
|---|---|---|---|
| 1 | Accident | 53 |
7.9%
|
| 2 | Ate something | 12 |
1.8%
|
| 3 | Someone hurt me | 25 |
3.7%
|
| 4 | Spontaneous | 536 |
80.2%
|
| 6 | Other | 31 |
4.6%
|
| 98 | DK | 11 |
1.6%
|
| 99 | 7 | ||
| Sysmiss | 9695 |