| Value | Category | Cases | |
|---|---|---|---|
| 1 | feet | 5 |
33.3%
|
| 2 | meters | 5 |
33.3%
|
| 3 | miles | 1 |
6.7%
|
| 4 | kilometers | 4 |
26.7%
|
| 77 | refuse | 0 |
0%
|
| 88 | dont know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 4955 |