| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Less than 1 km | 476 |
6.7%
|
| 2 | 2. 1 km to less than 3km | 805 |
11.4%
|
| 3 | 3. 3 km to less than 5 km | 410 |
5.8%
|
| 4 | 4. 5 km or more | 606 |
8.6%
|
| 9 | 9. I don't know | 3832 |
54.3%
|
| Sysmiss | 928 |
13.2%
|