| Value | Category | Cases | |
|---|---|---|---|
| 1 | feet | 416 |
40.1%
|
| 2 | meters | 276 |
26.6%
|
| 3 | miles | 12 |
1.2%
|
| 4 | kilometers | 334 |
32.2%
|
| 77 | refuse | 0 |
0%
|
| 88 | dont know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 3932 |