| Value | Category | Cases | |
|---|---|---|---|
| 1 | Small (less than 250 cc) | 0 |
0%
|
| 2 | Moderate (between 250 and 499 cc) | 1 |
20%
|
| 3 | Large (more than 500cc) | 4 |
80%
|
| 8 | Do not know | 0 |
0%
|
| 9 | No response | 0 |
0%
|
| Sysmiss | 116 |